{"id":"CVE-2026-82290","title":"Chainlit through 2.12.0 fails to validate ownership of feedback records in PUT and DELETE endpoints","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 …","severity":"medium","cvss":5.3,"cvssVector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:N","cwe":["CWE-639"],"published":"2026-08-28","updated":"2026-09-16","sourceUpdated":"2026-09-16T13:42:44.520","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-82290","references":[{"url":"https://github.com/Chainlit/chainlit","label":"disclosure@vulncheck.com"},{"url":"https://github.com/Chainlit/chainlit/blob/190ea74239d9e84b26e7c91bc2882dd038942564/backend/chainlit/server.py","label":"disclosure@vulncheck.com"},{"url":"https://github.com/Chainlit/chainlit/issues/2975","label":"disclosure@vulncheck.com"},{"url":"https://www.vulncheck.com/advisories/chainlit-feedback-endpoints-missing-ownership-validation","label":"disclosure@vulncheck.com"},{"url":"https://github.com/Chainlit/chainlit/issues/2975","label":"134c704f-9b21-4f2e-91b3-4a467353bcc0"}],"tags":["nvd"],"epss":0.00208,"epssPercentile":0.11231,"ingestedAt":"2026-09-16T13:56:12.599Z","slug":"CVE-2026-82290","body":"## Overview\n\nChainlit 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":29,"depthScoreParts":{"impact":29.2,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}