CVE-2026-82290

EUVD-2026-67821
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.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
VulnCheckCNA
5.3 MEDIUM
NETWORK
HIGH
LOW
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:N
Base Score
CVSS 3.x
EPSS Score
Percentile: 10.85%
Early Detection
Affected products identified ahead of NVD analysis through intelligence sources.
VendorProductVersionSource
chainlitchainlit
𝑥
≤ 2.12.0
CNA
Common Weakness Enumeration
References
https://github.com/Chainlit/chainlit
https://github.com/Chainlit/chainlit/blob/190ea74239d9e84b26e7c91bc2882dd038942564/backend/chainlit/server.py
https://github.com/Chainlit/chainlit/issues/2975
https://www.vulncheck.com/advisories/chainlit-feedback-endpoints-missing-ownership-validation