OpenClaw < 2026.4.2 - PKCE Verifier Exposure via OAuth State Parameter
OpenClaw before 2026.4.2 reuses the PKCE verifier as the OAuth state parameter in the Gemini OAuth flow, exposing it through the redirect URL. Attackers who capture the redirect URL can obtain both the authorization code and PKCE verifier, defeating PKCE protection and enabling token redemption.
Severity medium: primary CNA CVSS 6 v4.0 (worst CNA-provided scenario) Not listed in this KEV snapshot. Forecast present in this snapshot.
Published 2026-04-03T20:45:41.499Z. Updated 2026-09-24T14:17:31.108Z.