Information disclosure in OpenClaw - CVE-2026-34511
Published: April 8, 2026
Vulnerability identifier: #VU125263
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2026-34511
CWE-ID: CWE-200
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: OpenClaw
Affected software:
OpenClaw
OpenClaw
Detailed vulnerability description
The vulnerability allows a remote attacker to redeem OAuth tokens.
The vulnerability exists due to exposure of sensitive information in the Gemini OAuth flow when handling the OAuth redirect. A remote attacker can capture the redirect URL to redeem OAuth tokens.
The issue defeats PKCE interception protection because the PKCE verifier is reused as the OAuth state value and reflected back in the redirect URL alongside the authorization code.
How to mitigate CVE-2026-34511
Install security update from vendor's website.