Vulnerability Report

CVE-2026-3691

Title: OpenClaw Client PKCE Verifier Information Disclosure

Information Disclosure

Proof Of Concept

No public PoC currently indexed for CVE-2026-3691.

CWE Category CWE-200
Published Date Apr 11, 2026
Modified Date Apr 27, 2026
Exploit Status Not Found
Score 5.3 CVSS v3.0
Exploit Probability (EPSS)
0.46%

Vulnerability Summary

CVE-2026-3691: OpenClaw Client PKCE Verifier Information Disclosure Vulnerability. This vulnerability allows remote attackers to disclose stored credentials on affected installations of OpenClaw. User interaction is required to exploit this vulnerability in that the target must initiate an OAuth authorization flow. The specific flaw exists within the implementation of OAuth authorization. The issue results from the exposure of sensitive data in the authorization URL query string. An attacker can leverage this vulnerability to disclose stored credentials, leading to further compromise. Was ZDI-CAN-29381.

Impacted Vendors

O
openclaw 1

Reference Links

https://github.com/openclaw/openclaw/security/advisories/GHSA-6g25-pc82-vfwp https://www.zerodayinitiative.com/advisories/ZDI-26-229/
CVSS v3.0
Source Entity [email protected]
Severity MEDIUM
5.3
Attack Vector
NETWORK
Complexity
HIGH
Privileges
N/A
Interaction
REQUIRED
Confidentiality
N/A
Integrity
N/A
Availability
N/A
Scope
UNCHANGED
RAW VECTOR CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:N/A:N

Associated Attack Patterns (CAPEC)

Total: Patterns

CVE-2026-3691 Exploits & PoCs (Proof Of Concept)

No public PoCs found in our database for this CVE.

MODIFIED

Vulnerability data updated via NVD.

MODIFIED

Vulnerability data updated via NVD.

MODIFIED

Vulnerability data updated via NVD.

MODIFIED

Vulnerability data updated via NVD.

Attack Vector Matrix

Access Vector NETWORK
Complexity HIGH
Privileges N/A
Interaction REQUIRED
CVSS Vector String CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:N/A:N

Affected Stack

No specific products linked.