Vulnerability-Lookup

GHSA-9JPJ-G8VV-J5MF

Vulnerability from github – Published: 2026-04-04 06:26 – Updated: 2026-04-07 14:24

Summary

OpenClaw: Gemini OAuth exposed the PKCE verifier through the OAuth state parameter

Details

Summary

Before OpenClaw 2026.4.2, the Gemini OAuth flow reused the PKCE verifier as the OAuth state value. Because the provider reflected state back in the redirect URL, the verifier could be exposed alongside the authorization code.

Impact

Anyone who could capture the redirect URL could learn both the authorization code and the PKCE verifier, defeating PKCE's interception protection for that flow and enabling token redemption.

Affected Packages / Versions

Package: openclaw (npm)
Affected versions: <= 2026.4.1
Patched versions: >= 2026.4.2
Latest published npm version: 2026.4.1

Fix Commit(s)

a26f4d0f3ef0757db6c6c40277cc06a5de76c52f — separate OAuth state from the PKCE verifier

OpenClaw thanks @BG0ECV for reporting.

Severity ?

7.0 (High)


                  
                    CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:A/VC:H/VI:N/VA:N/SC:H/SI:H/SA:N

Show details on source website

JSON

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{
  "affected": [
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c= 2026.4.1"
      },
      "package": {
        "ecosystem": "npm",
        "name": "openclaw"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2026.4.2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-34511"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-345"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-04-04T06:26:55Z",
    "nvd_published_at": null,
    "severity": "HIGH"
  },
  "details": "## Summary\n\nBefore OpenClaw 2026.4.2, the Gemini OAuth flow reused the PKCE verifier as the OAuth `state` value. Because the provider reflected `state` back in the redirect URL, the verifier could be exposed alongside the authorization code.\n\n## Impact\n\nAnyone who could capture the redirect URL could learn both the authorization code and the PKCE verifier, defeating PKCE\u0027s interception protection for that flow and enabling token redemption.\n\n## Affected Packages / Versions\n\n- Package: `openclaw` (npm)\n- Affected versions: `\u003c= 2026.4.1`\n- Patched versions: `\u003e= 2026.4.2`\n- Latest published npm version: `2026.4.1`\n\n## Fix Commit(s)\n\n- `a26f4d0f3ef0757db6c6c40277cc06a5de76c52f` \u2014 separate OAuth state from the PKCE verifier\n\nOpenClaw thanks @BG0ECV for reporting.",
  "id": "GHSA-9jpj-g8vv-j5mf",
  "modified": "2026-04-07T14:24:16Z",
  "published": "2026-04-04T06:26:55Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/openclaw/openclaw/security/advisories/GHSA-9jpj-g8vv-j5mf"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-34511"
    },
    {
      "type": "WEB",
      "url": "https://github.com/openclaw/openclaw/commit/a26f4d0f3ef0757db6c6c40277cc06a5de76c52f"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/openclaw/openclaw"
    },
    {
      "type": "WEB",
      "url": "https://www.vulncheck.com/advisories/openclaw-pkce-verifier-exposure-via-oauth-state-parameter"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:A/VC:H/VI:N/VA:N/SC:H/SI:H/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "OpenClaw: Gemini OAuth exposed the PKCE verifier through the OAuth state parameter"
}

CVE-2026-34511 (GCVE-0-2026-34511)

Vulnerability from cvelistv5 – Published: 2026-04-03 20:45 – Updated: 2026-04-06 16:57 X_Open Source

Title

OpenClaw < 2026.4.2 - PKCE Verifier Exposure via OAuth State Parameter

Summary

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.

Severity ?

6 (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

5.3 (Medium)


                        
                          CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:N/A:N

CWE

CWE-330 - Use of Insufficiently Random Values

Assigner

VulnCheck

References

URL

Tags

	https://github.com/openclaw/openclaw/security/adv…	vendor-advisory
	https://github.com/openclaw/openclaw/commit/a26f4…	patch
	https://www.vulncheck.com/advisories/openclaw-pkc…	third-party-advisory

Impacted products

	Vendor	Product	Version
	OpenClaw	OpenClaw	Affected: 0 , < 2026.4.2 (semver) Unaffected: 2026.4.2 (semver)

Date Public ?

2026-04-02 00:00

Credits

RaaX

Show details on NVD website

JSON

To clipboard

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                "role": "CISA Coordinator",
                "timestamp": "2026-04-06T16:56:07.477987Z",
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Sightings

Author	Source	Type	Date

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

Action not permitted

GHSA-9JPJ-G8VV-J5MF

Summary

Impact

Affected Packages / Versions

Fix Commit(s)

CVE-2026-34511 (GCVE-0-2026-34511)

Tags

Sightings

Nomenclature