Chainlit versions prior to 2.9.4 contain a server-side request forgery (SSRF) vulnerability in the /project/element update flow when configured with the SQLAlchemy data layer backend. An authenticated client can provide a user-controlled url value in an Element, which is fetched by the SQLAlchemy element creation logic using an outbound HTTP GET request. This allows an attacker to make arbitrary HTTP requests from the Chainlit server to internal network services or cloud metadata endpoints and store the retrieved responses via the configured storage provider.
Fix
Patch, vendor advisory and mitigation references on NVD 1
- https://www.zafran.io/resources/chainleak-critical-ai-framework-vulnerabilities-expose-data-enable-cloud-takeover Exploit, Mitigation, Third Party Advisory
Every line above is quoted from NVD, CISA, Microsoft, the vendor's own advisory or DISA; nothing is generated.
Change history 1
- First seenCVSS 8.3 · chainlitNVD modified 2026-10-08 16:17
Affected (CPE criteria) 1
cpe:2.3:a:chainlit:chainlit:*:*:*:*:*:*:*:*
References 3
- https://github.com/Chainlit/chainlit/releases/tag/2.9.4 Product, Release Notes
- https://www.vulncheck.com/advisories/chainlit-sqlalchemy-data-layer-ssrf-via-project-element Third Party Advisory
- https://www.zafran.io/resources/chainleak-critical-ai-framework-vulnerabilities-expose-data-enable-cloud-takeover Exploit, Mitigation, Third Party Advisory