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Advisories

Chainlit < 2.10.1 Session Hijacking via WebSocket Session Restoration

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severity
critical
date
Affecting

  • Chainlit < 2.10.1

CWE
  • CWE-862 Missing Authorization
CVSS
9.1
CVSS V4 Vector
CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
Credit
Tanguy Snoeck
Description
Chainlit before 2.10.1 contains a session hijacking vulnerability that allows unauthenticated attackers to restore and inherit authenticated user sessions by presenting a valid sessionId during WebSocket session restoration without ownership verification. Attackers can exploit the restore_existing_session path to assume a victim's permissions and roles, enabling unauthorized invocation of tools and access to data restricted to the authenticated victim.

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