jq is a command-line JSON processor. Prior to 1.8.2,` jq --rawfile` can turn a handled oversized-string error into invalid-state reuse and a real heap out-of-bounds write in assertion-disabled builds. When jv_load_file(raw=1) reads an attacker-controlled file, it repeatedly appends file chunks to the same jv string accumulator. Once jv_string_append_buf() returns jv_invalid_with_msg("String too long"), the raw-file loop does not stop. If the file contains at least one more byte, the next loop iteration appends a new chunk to an object that is already invalid. With assertions enabled this aborts in jvp_string_ptr(). With assertions disabled, the invalid object is interpreted as a string object and ASan reports heap-buffer-overflow. This vulnerability is fixed in 1.8.2.
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Thu, 25 Jun 2026 18:30:00 +0000
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Thu, 25 Jun 2026 17:30:00 +0000
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| Description | jq is a command-line JSON processor. Prior to 1.8.2,` jq --rawfile` can turn a handled oversized-string error into invalid-state reuse and a real heap out-of-bounds write in assertion-disabled builds. When jv_load_file(raw=1) reads an attacker-controlled file, it repeatedly appends file chunks to the same jv string accumulator. Once jv_string_append_buf() returns jv_invalid_with_msg("String too long"), the raw-file loop does not stop. If the file contains at least one more byte, the next loop iteration appends a new chunk to an object that is already invalid. With assertions enabled this aborts in jvp_string_ptr(). With assertions disabled, the invalid object is interpreted as a string object and ASan reports heap-buffer-overflow. This vulnerability is fixed in 1.8.2. | |
| Title | jq --rawfile invalid-state reuse after String too long causes heap-buffer-overflow | |
| Weaknesses | CWE-787 | |
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Status: PUBLISHED
Assigner: GitHub_M
Published:
Updated: 2026-06-25T17:55:27.488Z
Reserved: 2026-06-01T18:50:36.056Z
Link: CVE-2026-49839
Updated: 2026-06-25T17:55:14.988Z
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OpenCVE Enrichment
Updated: 2026-06-25T18:30:14Z
Weaknesses