{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-63076", "assignerOrgId": "3a12439a-ef3a-4c79-92e6-6081a721f1e5", "state": "PUBLISHED", "assignerShortName": "openssl", "dateReserved": "2026-07-15T13:10:26.188Z", "datePublished": "2026-08-25T13:00:11.218Z", "dateUpdated": "2026-08-25T14:37:32.193Z"}, "containers": {"cna": {"affected": [{"defaultStatus": "unaffected", "product": "OpenSSL", "vendor": "OpenSSL", "versions": [{"lessThan": "4.0.2", "status": "affected", "version": "4.0.0", "versionType": "semver"}, {"lessThan": "3.6.4", "status": "affected", "version": "3.6.0", "versionType": "semver"}, {"lessThan": "3.5.8", "status": "affected", "version": "3.5.0", "versionType": "semver"}, {"lessThan": "3.4.7", "status": "affected", "version": "3.4.0", "versionType": "semver"}, {"lessThan": "3.0.22", "status": "affected", "version": "3.0.0", "versionType": "semver"}]}], "credits": [{"lang": "en", "type": "reporter", "value": "Ying Dong"}, {"lang": "en", "type": "reporter", "value": "Bhabani Sankar Das"}, {"lang": "en", "type": "remediation developer", "value": "Daniel Kubec"}], "datePublic": "2026-08-25T11:36:16.000Z", "descriptions": [{"lang": "en", "supportingMedia": [{"base64": false, "type": "text/html", "value": "Issue summary: OpenSSL CMP password based protection verification only<br>checks whether the protectionAlg parameter was not NULL and not its<br>ASN.1 type, before treating it as a PBMParameter. A crafted message can<br>contain a parameter of a different type, which is then dereferenced as an<br>invalid pointer.<br><br>Impact summary: A remote, unauthenticated attacker can crash an application<br>acting as a CMP server that accepts PBM-protected messages, or a CMP client<br>talking to a malicious or intercepted CMP server, resulting in a Denial of<br>Service.<br><br>CWE: CWE-476: NULL Pointer Dereference<br><br>Description: When verifying the password-based MAC protection of a CMP<br>message, OpenSSL library reads the protectionAlg algorithm parameter with<br>X509_ALGOR_get0(), which returns both the parameter type and its value<br>pointer. The value is then cast to an ASN1_STRING and treated as the<br>expected PBMParameter after only checking that pointer is not NULL. The<br>parameter type returned by X509_ALGOR_get0() was never consulted.<br><br>This happens during protection verification, before any MAC is computed, so<br>no knowledge of the PBM shared secret is required; the only precondition is<br>that PBM verification is reachable. On the server side this is reached from<br>OSSL_CMP_SRV_process_request() for any application that stands up a CMP<br>server accepting PBM-protected messages, and on the client side from CMP<br>response validation against a malicious or on-path (MITM) server. The<br>reliable consequence is a denial of service; there is no memory disclosure,<br>no controlled memory write, and no path to code execution. CMP is a<br>specialized feature that an application must explicitly enable.<br><br>FIPS impact: no<br>As the CMP code lives outside the FIPS module boundary, no FIPS modules<br>are affected by this CVE."}], "value": "Issue summary: OpenSSL CMP password based protection verification only\nchecks whether the protectionAlg parameter was not NULL and not its\nASN.1 type, before treating it as a PBMParameter. A crafted message can\ncontain a parameter of a different type, which is then dereferenced as an\ninvalid pointer.\n\nImpact summary: A remote, unauthenticated attacker can crash an application\nacting as a CMP server that accepts PBM-protected messages, or a CMP client\ntalking to a malicious or intercepted CMP server, resulting in a Denial of\nService.\n\nCWE: CWE-476: NULL Pointer Dereference\n\nDescription: When verifying the password-based MAC protection of a CMP\nmessage, OpenSSL library reads the protectionAlg algorithm parameter with\nX509_ALGOR_get0(), which returns both the parameter type and its value\npointer. The value is then cast to an ASN1_STRING and treated as the\nexpected PBMParameter after only checking that pointer is not NULL. The\nparameter type returned by X509_ALGOR_get0() was never consulted.\n\nThis happens during protection verification, before any MAC is computed, so\nno knowledge of the PBM shared secret is required; the only precondition is\nthat PBM verification is reachable. On the server side this is reached from\nOSSL_CMP_SRV_process_request() for any application that stands up a CMP\nserver accepting PBM-protected messages, and on the client side from CMP\nresponse validation against a malicious or on-path (MITM) server. The\nreliable consequence is a denial of service; there is no memory disclosure,\nno controlled memory write, and no path to code execution. CMP is a\nspecialized feature that an application must explicitly enable.\n\nFIPS impact: no\nAs the CMP code lives outside the FIPS module boundary, no FIPS modules\nare affected by this CVE."}], "metrics": [{"format": "other", "other": {"content": {"text": "Moderate"}, "type": "https://openssl-library.org/policies/general/security-policy/"}}], "problemTypes": [{"descriptions": [{"cweId": "CWE-476", "description": "CWE-476 NULL Pointer Dereference", "lang": "en", "type": "CWE"}]}], "providerMetadata": {"orgId": "3a12439a-ef3a-4c79-92e6-6081a721f1e5", "shortName": "openssl", "dateUpdated": "2026-08-25T13:00:11.218Z"}, "references": [{"name": "OpenSSL Advisory", "tags": ["vendor-advisory"], "url": "https://openssl-library.org/news/secadv/20260825.txt"}, {"name": "4.0.2 git commit", "tags": ["patch"], "url": "https://github.com/openssl/openssl/commit/a17cc8d612ecff6d94a9b7ca8b5283ddf5ff570e"}, {"name": "3.6.4 git commit", "tags": ["patch"], "url": "https://github.com/openssl/openssl/commit/a7af46a92d0ce19a90e669ef56d2576a07924226"}, {"name": "3.5.8 git commit", "tags": ["patch"], "url": "https://github.com/openssl/openssl/commit/cdacfff557389abfa9e4615abded2ec984517d6c"}, {"name": "3.4.7 git commit", "tags": ["patch"], "url": "https://github.com/openssl/openssl/commit/a1f348ccb328c3afbd4ba6883f9b7c813c043259"}, {"name": "3.0.22 git commit", "tags": ["patch"], "url": "https://github.com/openssl/openssl/commit/37882aa2e0256e1072442a8f62f7db45b995c45b"}], "source": {"discovery": "UNKNOWN"}, "title": "Invalid Pointer Dereference in CMP Server via Crafted protectionAlg", "x_generator": {"engine": "Vulnogram 0.2.0"}}, "adp": [{"metrics": [{"cvssV3_1": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.5, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "NONE"}}, {"other": {"type": "ssvc", "content": {"timestamp": "2026-08-25T14:37:28.943884Z", "id": "CVE-2026-63076", "options": [{"Exploitation": "none"}, {"Automatable": "yes"}, {"Technical Impact": "partial"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-08-25T14:37:32.193Z"}}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"cvssV3_1": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.5, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "NONE"}}, {"other": {"type": "ssvc", "content": {"id": "CVE-2026-63076", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "yes"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2026-08-25T14:37:28.943884Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-08-25T14:37:23.862Z"}}], "cna": {"title": "Invalid Pointer Dereference in CMP Server via Crafted protectionAlg", "source": {"discovery": "UNKNOWN"}, "credits": [{"lang": "en", "type": "reporter", "value": "Ying Dong"}, {"lang": "en", "type": "reporter", "value": "Bhabani Sankar Das"}, {"lang": "en", "type": "remediation developer", "value": "Daniel Kubec"}], "metrics": [{"other": {"type": "https://openssl-library.org/policies/general/security-policy/", "content": {"text": "Moderate"}}, "format": "other"}], "affected": [{"vendor": "OpenSSL", "product": "OpenSSL", "versions": [{"status": "affected", "version": "4.0.0", "lessThan": "4.0.2", "versionType": "semver"}, {"status": "affected", "version": "3.6.0", "lessThan": "3.6.4", "versionType": "semver"}, {"status": "affected", "version": "3.5.0", "lessThan": "3.5.8", "versionType": "semver"}, {"status": "affected", "version": "3.4.0", "lessThan": "3.4.7", "versionType": "semver"}, {"status": "affected", "version": "3.0.0", "lessThan": "3.0.22", "versionType": "semver"}], "defaultStatus": "unaffected"}], "datePublic": "2026-08-25T11:36:16.000Z", "references": [{"url": "https://openssl-library.org/news/secadv/20260825.txt", "name": "OpenSSL Advisory", "tags": ["vendor-advisory"]}, {"url": "https://github.com/openssl/openssl/commit/a17cc8d612ecff6d94a9b7ca8b5283ddf5ff570e", "name": "4.0.2 git commit", "tags": ["patch"]}, {"url": "https://github.com/openssl/openssl/commit/a7af46a92d0ce19a90e669ef56d2576a07924226", "name": "3.6.4 git commit", "tags": ["patch"]}, {"url": "https://github.com/openssl/openssl/commit/cdacfff557389abfa9e4615abded2ec984517d6c", "name": "3.5.8 git commit", "tags": ["patch"]}, {"url": "https://github.com/openssl/openssl/commit/a1f348ccb328c3afbd4ba6883f9b7c813c043259", "name": "3.4.7 git commit", "tags": ["patch"]}, {"url": "https://github.com/openssl/openssl/commit/37882aa2e0256e1072442a8f62f7db45b995c45b", "name": "3.0.22 git commit", "tags": ["patch"]}], "x_generator": {"engine": "Vulnogram 0.2.0"}, "descriptions": [{"lang": "en", "value": "Issue summary: OpenSSL CMP password based protection verification only\nchecks whether the protectionAlg parameter was not NULL and not its\nASN.1 type, before treating it as a PBMParameter. A crafted message can\ncontain a parameter of a different type, which is then dereferenced as an\ninvalid pointer.\n\nImpact summary: A remote, unauthenticated attacker can crash an application\nacting as a CMP server that accepts PBM-protected messages, or a CMP client\ntalking to a malicious or intercepted CMP server, resulting in a Denial of\nService.\n\nCWE: CWE-476: NULL Pointer Dereference\n\nDescription: When verifying the password-based MAC protection of a CMP\nmessage, OpenSSL library reads the protectionAlg algorithm parameter with\nX509_ALGOR_get0(), which returns both the parameter type and its value\npointer. The value is then cast to an ASN1_STRING and treated as the\nexpected PBMParameter after only checking that pointer is not NULL. The\nparameter type returned by X509_ALGOR_get0() was never consulted.\n\nThis happens during protection verification, before any MAC is computed, so\nno knowledge of the PBM shared secret is required; the only precondition is\nthat PBM verification is reachable. On the server side this is reached from\nOSSL_CMP_SRV_process_request() for any application that stands up a CMP\nserver accepting PBM-protected messages, and on the client side from CMP\nresponse validation against a malicious or on-path (MITM) server. The\nreliable consequence is a denial of service; there is no memory disclosure,\nno controlled memory write, and no path to code execution. CMP is a\nspecialized feature that an application must explicitly enable.\n\nFIPS impact: no\nAs the CMP code lives outside the FIPS module boundary, no FIPS modules\nare affected by this CVE.", "supportingMedia": [{"type": "text/html", "value": "Issue summary: OpenSSL CMP password based protection verification only<br>checks whether the protectionAlg parameter was not NULL and not its<br>ASN.1 type, before treating it as a PBMParameter. A crafted message can<br>contain a parameter of a different type, which is then dereferenced as an<br>invalid pointer.<br><br>Impact summary: A remote, unauthenticated attacker can crash an application<br>acting as a CMP server that accepts PBM-protected messages, or a CMP client<br>talking to a malicious or intercepted CMP server, resulting in a Denial of<br>Service.<br><br>CWE: CWE-476: NULL Pointer Dereference<br><br>Description: When verifying the password-based MAC protection of a CMP<br>message, OpenSSL library reads the protectionAlg algorithm parameter with<br>X509_ALGOR_get0(), which returns both the parameter type and its value<br>pointer. The value is then cast to an ASN1_STRING and treated as the<br>expected PBMParameter after only checking that pointer is not NULL. The<br>parameter type returned by X509_ALGOR_get0() was never consulted.<br><br>This happens during protection verification, before any MAC is computed, so<br>no knowledge of the PBM shared secret is required; the only precondition is<br>that PBM verification is reachable. On the server side this is reached from<br>OSSL_CMP_SRV_process_request() for any application that stands up a CMP<br>server accepting PBM-protected messages, and on the client side from CMP<br>response validation against a malicious or on-path (MITM) server. The<br>reliable consequence is a denial of service; there is no memory disclosure,<br>no controlled memory write, and no path to code execution. CMP is a<br>specialized feature that an application must explicitly enable.<br><br>FIPS impact: no<br>As the CMP code lives outside the FIPS module boundary, no FIPS modules<br>are affected by this CVE.", "base64": false}]}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-476", "description": "CWE-476 NULL Pointer Dereference"}]}], "providerMetadata": {"orgId": "3a12439a-ef3a-4c79-92e6-6081a721f1e5", "shortName": "openssl", "dateUpdated": "2026-08-25T13:00:11.218Z"}}}, "cveMetadata": {"cveId": "CVE-2026-63076", "state": "PUBLISHED", "dateUpdated": "2026-08-25T14:37:32.193Z", "dateReserved": "2026-07-15T13:10:26.188Z", "assignerOrgId": "3a12439a-ef3a-4c79-92e6-6081a721f1e5", "datePublished": "2026-08-25T13:00:11.218Z", "assignerShortName": "openssl"}, "dataVersion": "5.2"}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "OpenSSL", "vendor": "OpenSSL", "versions": [{"lessThan": "4.0.2", "status": "affected", "version": "4.0.0", "versionType": "semver"}, {"lessThan": "3.6.4", "status": "affected", "version": "3.6.0", "versionType": "semver"}, {"lessThan": "3.5.8", "status": "affected", "version": "3.5.0", "versionType": "semver"}, {"lessThan": "3.4.7", "status": "affected", "version": "3.4.0", "versionType": "semver"}, {"lessThan": "3.0.22", "status": "affected", "version": "3.0.0", "versionType": "semver"}]}], "source": "[email protected]"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Issue summary: OpenSSL CMP password based protection verification only\nchecks whether the protectionAlg parameter was not NULL and not its\nASN.1 type, before treating it as a PBMParameter. A crafted message can\ncontain a parameter of a different type, which is then dereferenced as an\ninvalid pointer.\n\nImpact summary: A remote, unauthenticated attacker can crash an application\nacting as a CMP server that accepts PBM-protected messages, or a CMP client\ntalking to a malicious or intercepted CMP server, resulting in a Denial of\nService.\n\nCWE: CWE-476: NULL Pointer Dereference\n\nDescription: When verifying the password-based MAC protection of a CMP\nmessage, OpenSSL library reads the protectionAlg algorithm parameter with\nX509_ALGOR_get0(), which returns both the parameter type and its value\npointer. The value is then cast to an ASN1_STRING and treated as the\nexpected PBMParameter after only checking that pointer is not NULL. The\nparameter type returned by X509_ALGOR_get0() was never consulted.\n\nThis happens during protection verification, before any MAC is computed, so\nno knowledge of the PBM shared secret is required; the only precondition is\nthat PBM verification is reachable. On the server side this is reached from\nOSSL_CMP_SRV_process_request() for any application that stands up a CMP\nserver accepting PBM-protected messages, and on the client side from CMP\nresponse validation against a malicious or on-path (MITM) server. The\nreliable consequence is a denial of service; there is no memory disclosure,\nno controlled memory write, and no path to code execution. CMP is a\nspecialized feature that an application must explicitly enable.\n\nFIPS impact: no\nAs the CMP code lives outside the FIPS module boundary, no FIPS modules\nare affected by this CVE."}], "id": "CVE-2026-63076", "lastModified": "2026-08-25T15:16:36.593", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 3.6, "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-63076", "options": [{"exploitation": "none"}, {"automatable": "yes"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-08-25T14:37:28.943884Z", "version": "2.0.3"}}]}, "published": "2026-08-25T13:19:26.543", "references": [{"source": "[email protected]", "url": "https://github.com/openssl/openssl/commit/37882aa2e0256e1072442a8f62f7db45b995c45b"}, {"source": "[email protected]", "url": "https://github.com/openssl/openssl/commit/a17cc8d612ecff6d94a9b7ca8b5283ddf5ff570e"}, {"source": "[email protected]", "url": "https://github.com/openssl/openssl/commit/a1f348ccb328c3afbd4ba6883f9b7c813c043259"}, {"source": "[email protected]", "url": "https://github.com/openssl/openssl/commit/a7af46a92d0ce19a90e669ef56d2576a07924226"}, {"source": "[email protected]", "url": "https://github.com/openssl/openssl/commit/cdacfff557389abfa9e4615abded2ec984517d6c"}, {"source": "[email protected]", "url": "https://openssl-library.org/news/secadv/20260825.txt"}], "sourceIdentifier": "[email protected]", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-476"}], "source": "[email protected]", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[4.0.0,4.0.2)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[3.6.0,3.6.4)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[3.5.0,3.5.8)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[3.4.0,3.4.7)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[3.0.0,3.0.22)"}}], "enrichment": {"confidence": 95.0, "confidence_source": "inferred", "scores": [{"score": 95.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "OpenSSL", "source": "cna", "vendor": "OpenSSL"}, "product": "openssl", "vendor": "openssl"}], "created": "2026-08-25T14:45:03.807080+00:00", "updated": "2026-08-25T16:45:04.347532+00:00", "vendors": ["openssl", "openssl$PRODUCT$openssl"]}