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.

INFO

Published Date :

2026-04-03T20:45:41.499Z

Last Modified :

2026-04-06T16:57:09.160Z

Source :

VulnCheck
AFFECTED PRODUCTS

The following products are affected by CVE-2026-34511 vulnerability.

Vendors Products
Openclaw
  • Openclaw
REFERENCES

Here, you will find a curated list of external links that provide in-depth information to CVE-2026-34511.

URL Resource
https://github.com/openclaw/openclaw/commit/a26f4d0f3ef0757db6c6c40277cc06a5de76c52f cve-icon cve-icon
https://github.com/openclaw/openclaw/security/advisories/GHSA-9jpj-g8vv-j5mf cve-icon cve-icon
https://www.vulncheck.com/advisories/openclaw-pkce-verifier-exposure-via-oauth-state-parameter cve-icon cve-icon
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CVSS Vulnerability Scoring System

Detailed values of each vector for above chart.
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SS Confidentiality
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Detailed values of each vector for above chart.
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality Impact
Integrity Impact
Availability Impact