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

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 bo...

CVE-2026-34511 OpenClaw < 2026.4.2 - PKCE Verifier Exposure via OAuth State Parameter

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...

OpenClaw security feature vulnerability

OpenClaw is an open-source intelligent artificial assistant developed by OpenClaw. Versions of OpenClaw prior to 2026.4.2 had security feature vulnerabilities. These vulnerabilities stemmed from the reuse of the PKCE verifier as a state parameter in the Gemini OAuth process, which could lead to t...

PT-2026-29057

Name of the Vulnerable Software and Affected Versions OpenClaw affected versions not specified Description An issue exists in OpenClaw that allows remote attackers to disclose stored credentials. User interaction is required, specifically the target must initiate an OAuth authorization flow. The...

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...

CVE-2026-32245

Tinyauth is an authentication and authorization server. Prior to 5.0.3, the OIDC token endpoint does not verify that the client exchanging an authorization code is the same client the code was issued to. A malicious OIDC client operator can exchange another client's authorization code using their...

CVE-2026-32245: Incorrect Authorization

Tinyauth is an authentication and authorization server. Prior to 5.0.3, the OIDC token endpoint does not verify that the client exchanging an authorization code is the same client the code was issued to. A malicious OIDC client operator can exchange another client's authorization code using their...

CVE-2026-28513

Pocket ID is an OIDC provider that allows users to authenticate with their passkeys to your services. Prior to 2.4.0, the OIDC token endpoint rejects an authorization code only when both the client ID is wrong and the code is expired. This allows cross-client code exchange and expired code reuse...

CVE-2026-28513

Pocket ID is an OIDC provider that allows users to authenticate with their passkeys to your services. Prior to 2.4.0, the OIDC token endpoint rejects an authorization code only when both the client ID is wrong and the code is expired. This allows cross-client code exchange and expired code reuse...

CVE-2026-28513: Incorrect Authorization

Pocket ID is an OIDC provider that allows users to authenticate with their passkeys to your services. Prior to 2.4.0, the OIDC token endpoint rejects an authorization code only when both the client ID is wrong and the code is expired. This allows cross-client code exchange and expired code reuse...

CVE-2026-28513 Pocket ID: OIDC authorization code validation uses AND instead of OR, allowing cross-client token exchange

Pocket ID is an OIDC provider that allows users to authenticate with their passkeys to your services. Prior to 2.4.0, the OIDC token endpoint rejects an authorization code only when both the client ID is wrong and the code is expired. This allows cross-client code exchange and expired code reuse...

PT-2026-24137

Name of the Vulnerable Software and Affected Versions Pocket ID versions prior to 2.4.0 Description Pocket ID is an OIDC provider susceptible to cross-client code exchange and expired code reuse. The OIDC token endpoint incorrectly validates authorization codes, only rejecting them when both the...

SUSE CVE-2025-12421

Mattermost versions 11.0.x = 11.0.2, 10.12.x = 10.12.1, 10.11.x = 10.11.4, 10.5.x = 10.5.12 fail to to verify that the token used during the code exchange originates from the same authentication flow, which allows an authenticated user to perform account takeover via a specially crafted email...

GO-2025-4170 Mattermost fails to to verify the token used during code exchange in github.com/mattermost/mattermost-server

Mattermost fails to to verify the token used during code exchange in github.com/mattermost/mattermost-server. NOTE: The source advisory for this report contains additional versions that could not be automatically mapped to standard Go module versions. If this is causing false-positive reports fro...

Mattermost Authentication Bypass

The vulnerability of the Mattermost instant messaging application is related to the improper implementation of the authentication algorithm when processing the /users/login/sso/code-exchange endpoint. Exploiting this vulnerability allows a malicious actor to bypass security restrictions and gain...

CVE-2025-12421

Mattermost versions 11.0.x = 11.0.2, 10.12.x = 10.12.1, 10.11.x = 10.11.4, 10.5.x = 10.5.12 fail to to verify that the token used during the code exchange originates from the same authentication flow, which allows an authenticated user to perform account takeover via a specially crafted email...

Incorrect Implementation of Authentication Algorithm

Overview Affected versions of this package are vulnerable to Incorrect Implementation of Authentication Algorithm. An attacker can gain unauthorized access to another user's account by leveraging a specially crafted email address when switching authentication methods and sending a request to the...

Incorrect Implementation of Authentication Algorithm

Overview Affected versions of this package are vulnerable to Incorrect Implementation of Authentication Algorithm. An attacker can gain unauthorized access to another user's account by leveraging a specially crafted email address when switching authentication methods and sending a request to the...

Incorrect Implementation of Authentication Algorithm

Overview Affected versions of this package are vulnerable to Incorrect Implementation of Authentication Algorithm. An attacker can gain unauthorized access to another user's account by leveraging a specially crafted email address when switching authentication methods and sending a request to the...

Incorrect Implementation of Authentication Algorithm

Overview Affected versions of this package are vulnerable to Incorrect Implementation of Authentication Algorithm. An attacker can gain unauthorized access to another user's account by leveraging a specially crafted email address when switching authentication methods and sending a request to the...