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CVE-2026-86099

Chainlit through 2.12.0 Path Traversal via socket.io sessionId PUBLISHED

Description (CNA)

Chainlit through 2.12.0 fails to validate the client-supplied socket.io sessionId parameter, allowing unauthenticated attackers to traverse filesystem paths by injecting absolute or relative path sequences. Attackers can craft malicious sessionId values that escape the upload directory and recursively delete arbitrary directories accessible to the service process.

Affected (CNA)

Vendor / productVersions
Chainlit / chainlitaffected 0 through 2.12.0

CWE

CWE-22

References

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.