CVE-2026-34511
OpenClaw < 2026.4.2 - PKCE Verifier Exposure via OAuth State Parameter
- State
- Published
- Severity
- 6.0 Medium
- Published
- Apr 3, 2026
- Updated
- Sep 24, 2026
- Reserved
- Mar 30, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 6.0 Medium | 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 | VulnCheck |
| 3.1 | 5.3 Medium | CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:N/A:N | VulnCheck |
Weaknesses
- CWE-330 Use of Insufficiently Random Values
Affected Products
| Product | Versions |
|---|---|
OpenClawOpenClaw |
|
References
- GitHub Security Advisory (GHSA-9jpj-g8vv-j5mf)vendor-advisory
- Patch Commitpatch
- https://www.vulncheck.com/advisories/openclaw-pkce-verifier-exposure-via-oauth-state-parameterthird-party-advisory
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