| Component | OpenClaw |
| Severity | medium (CVSS 5.3) |
| CVSS vector | CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:N/A:N |
| Published (NVD) | 2026-04-03 |
| Last modified | 2026-07-24 |
| Affected versions | openclaw < 2026.4.2 |
| Fixed in | 2026.4.2 |
| Weakness | CWE-330 |
| CISA KEV | not listed |
NVD 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.
What to do
- Upgrade OpenClaw to
2026.4.2or later. - Do not expose the component's API or UI to the internet without authentication in front of it.
Sources
- NVD: CVE-2026-34511
- https://github.com/openclaw/openclaw/security/advisories/GHSA-9jpj-g8vv-j5mf
- https://github.com/openclaw/openclaw/commit/a26f4d0f3ef0757db6c6c40277cc06a5de76c52f
- https://www.vulncheck.com/advisories/openclaw-pkce-verifier-exposure-via-oauth-state-parameter
Read more
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