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.
History

Mon, 06 Apr 2026 18:00:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Fri, 03 Apr 2026 21:30:00 +0000

Type Values Removed Values Added
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.
Title OpenClaw < 2026.4.2 - PKCE Verifier Exposure via OAuth State Parameter
First Time appeared Openclaw
Openclaw openclaw
Weaknesses CWE-330
CPEs cpe:2.3:a:openclaw:openclaw:*:*:*:*:*:node.js:*:*
Vendors & Products Openclaw
Openclaw openclaw
References
Metrics cvssV3_1

{'score': 5.3, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:N/A:N'}

cvssV4_0

{'score': 6, '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'}


cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published: 2026-04-03T20:45:41.499Z

Updated: 2026-04-06T16:57:09.160Z

Reserved: 2026-03-30T13:51:47.549Z

Link: CVE-2026-34511

cve-icon Vulnrichment

Updated: 2026-04-06T16:56:57.771Z

cve-icon NVD

Status : Received

Published: 2026-04-03T21:17:11.517

Modified: 2026-04-03T21:17:11.517

Link: CVE-2026-34511

cve-icon Redhat

No data.