CVE-2026-82290

Summary

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.

Affected Software

Weaknesses

• CWE-639: Authorization Bypass Through User-Controlled Key

References

• https://github.com/Chainlit/chainlit/issues/2975
• https://github.com/Chainlit/chainlit
• https://github.com/Chainlit/chainlit/blob/190ea74239d9e84b26e7c91bc2882dd038942564/backend/chainlit/server.py
• https://www.vulncheck.com/advisories/chainlit-feedback-endpoints-missing-ownership-validation

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