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Advisories

OpenClaw < 2026.4.2 - PKCE Verifier Exposure via OAuth State Parameter

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severity
medium
date
Affecting

  • OpenClaw < 2026.4.2

CWE
  • CWE-330 Use of Insufficiently Random Values
CVSS
6
CVSS V4 Vector
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
Credit
RaaX
Description
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.

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