Chainlit through 2.12.0 fails to validate ownership of feedback records in PUT and DELETE endpoints. Authenticated attackers can delete or modify other users' feedback by supplying arbitrary feedback identifiers, corrupting human-rating data used for model evaluation.

Attack Vector Network

Attack Complexity High

Privileges Required Low

Attack Requirements Present

User Interaction None

Vulnerable System Confidentiality Impact None

Vulnerable System Integrity Impact High

Vulnerable System Availability Impact None

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

Attack Vector Network

Attack Complexity High

Privileges Required Low

Scope Unchanged

Confidentiality Impact None

Integrity Impact High

Availability Impact None

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Key SSVC decision points have not yet been added.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
Chainlit chainlit unaffected
Version Status Constraints
0 affected ≤ 2.12.0

No data.

No data.

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Project Subscriptions

Vendors Products
Chainlit Subscribe
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Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://github.com/Chainlit/chainlit cve-icon cve-icon
https://github.com/Chainlit/chainlit/blob/190ea74239d9e84b26e7c91bc2882dd038942564/backend/chainlit/server.py cve-icon cve-icon
https://github.com/Chainlit/chainlit/issues/2975 cve-icon cve-icon
https://www.vulncheck.com/advisories/chainlit-feedback-endpoints-missing-ownership-validation cve-icon cve-icon
History

Fri, 28 Aug 2026 19:45:00 +0000

Type Values Removed Values Added
Description Chainlit through 2.12.0 fails to validate ownership of feedback records in PUT and DELETE endpoints. Authenticated attackers can delete or modify other users' feedback by supplying arbitrary feedback identifiers, corrupting human-rating data used for model evaluation.
Title Chainlit Feedback Endpoints Missing Ownership Validation
First Time appeared Chainlit
Chainlit chainlit
Weaknesses CWE-639
CPEs cpe:2.3:a:chainlit:chainlit:*:*:*:*:*:*:*:*
Vendors & Products Chainlit
Chainlit chainlit
References
Metrics cvssV3_1

{'score': 5.3, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:N'}

cvssV4_0

{'score': 6, 'vector': 'CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2026-08-28T16:19:07.258Z

Reserved: 2026-08-28T11:12:54.097Z

Link: CVE-2026-82290

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-08-28T20:20:20.680

Modified: 2026-08-28T20:20:20.680

Link: CVE-2026-82290

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-08-28T22:15:04Z

Weaknesses