CVE-2026-34511

MEDIUM

OpenClaw < 2026.4.2 - PKCE Verifier Exposure via OAuth State Parameter

Title source: cna

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.

References (3)

[Vendor Advisory] https://github.com/openclaw/openclaw/security/advisories/GHSA-9jpj-g8vv-j5mf

[Patch] https://github.com/openclaw/openclaw/commit/a26f4d0f3ef0757db6c6c40277cc06a5de76c52f

View Patch ZIP pw:eip

[Third Party Advisory] https://www.vulncheck.com/advisories/openclaw-pkce-verifier-exposure-via-oauth-state-parameter

Scores

CVSS v3 5.3

EPSS 0.0003

EPSS Percentile 9.7%

Attack Vector NETWORK

CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:N/A:N

CISA SSVC

Vulnrichment

Exploitation none

Automatable no

Technical Impact partial

Details

CWE

CWE-330

Status published

Products (4)

npm/openclaw 0 - 2026.4.2npm

OpenClaw/OpenClaw < 2026.4.2

openclaw/openclaw < 2026.4.2

OpenClaw/OpenClaw 2026.4.2

Published Apr 03, 2026

Tracked Since Apr 04, 2026