PT-2026-108815

Name of the Vulnerable Software and Affected Versions Apache CXF versions prior to 4.2.4 Apache CXF versions prior to 4.1.9 Apache CXF versions prior to 3.6.13 Description Improper enforcement of single-use authorization code semantics in the JPA OAuth2 authorization code grant provider allows a...

CVE-2026-73309

CVE-2026-73309: Empty OAuth2 credentials bypass XenForo before 2.3.13 can skip OAuth2 client-secret and PKCE verification when an empty string reaches the token endpoint. What happens The endpoint checks whether clientsecret and codeverifier keys exist, then performs the comparisons only when the...

kafka-keycloak-oauth

Apache Kafka 4.1.0 with Keycloak OAuth2 Authentication Production-ready Apache Kafka 4.1.0 KRaft mode with Keycloak 26.1.1 OAuth2/OIDC authentication using Strimzi Kafka image. Why This Project vs kafka-oauth-keycloak-tls-demo This is an evolution of the previous POC with significant improvements...

dovecot: Dovecot: Authentication bypass via incorrect OAuth2 token validation

A flaw was found in Dovecot. This vulnerability allows an attacker to bypass authentication by exploiting how OAuth2 tokens are validated. If an OAuth2 token response does not include a scope claim, Dovecot incorrectly uses the audience claim in its place for authorization checks. This can lead t...

CVE-2026-3456-OAuth2-PKCE-Race-Condition-Account-Takeover-

8. CVE-2026-3456 – OAuth2 PKCE Race Condition Account Takeover Overview A race condition in the OAuth2 authorization server allows an attacker to reuse a victim’s authorization code before the legitimate client redeems it, by guessing or brute‑forcing the PKCE codeverifier within a small time...

CVE-2026-67404

A flaw was found in rabbitmq-server. When the OAuth2 plugin fetches JWKS and no CA bundle is available, TLS verification silently falls back to verifynone. A man-in-the-middle attacker can forge the JWKS response, causing the broker to accept arbitrary JWTs. Mitigation Mitigation for this issue i...

msteams

msteams A Mythic C2 Profile that uses the Microsoft Graph API to communicate through a Microsoft Teams channel. How It Works Agent Microsoft Teams Channel C2 Server Mythic 1. The agent authenticates to Microsoft Entra ID via OAuth2 client credentials 2. Posts its Mythic message base64-encoded,...

Spring Security OAuth2 Remote Command Execution

Spring Security OAuth versions 2.0.0 to 2.0.9 and 1.0.0 to 1.0.5 contain a remote command execution vulnerability. When processing authorization requests using the whitelabel views, the responsetype parameter value was executed as Spring SpEL which enabled a malicious user to trigger remote comma...

ALSA-2026:79371 Important: dovecot security update

Dovecot is an IMAP server for Linux and other UNIX-like systems, written primarily with security in mind. It also contains a small POP3 server, and supports e-mail in either the maildir or mbox format. The SQL drivers and authentication plug-ins are provided as subpackages. Security Fixes: doveco...

CVE-2026-101023

A flaw was found in Gitea. The OAuth2 Open Authorization token endpoint validates the signature and grant of a token during a refresh request, but fails to confirm that the submitted token is specifically a refresh token. An attacker or user possessing a valid, unexpired access token can exchange...

CVE-2026-101023

Gitea's OAuth2 token endpoint verified the signature and grant of a token submitted with the refreshtoken grant type, but not that the token was a refresh token. An unexpired access token for the same OAuth2 application and grant could be exchanged for a new access token and refresh token. Whoeve...

CVE-2026-101023 Gitea OAuth2 refresh token grant accepts access tokens

Gitea's OAuth2 token endpoint verified the signature and grant of a token submitted with the refreshtoken grant type, but not that the token was a refresh token. An unexpired access token for the same OAuth2 application and grant could be exchanged for a new access token and refresh token. Whoeve...

EUVD-2026-94061

Gitea's OAuth2 token endpoint verified the signature and grant of a token submitted with the refreshtoken grant type, but not that the token was a refresh token. An unexpired access token for the same OAuth2 application and grant could be exchanged for a new access token and refresh token. Whoeve...

CVE-2026-101023

A flaw in Gitea allows an attacker or user to maintain persistent access to the application. The OAuth2 token endpoint validates the signature and grant of a token submitted with the refresh_token grant type but fails to verify that the submitted token is specifically a refresh token . Consequent...

CVE-2026-101023 Gitea OAuth2 refresh token grant accepts access tokens

Gitea's OAuth2 token endpoint verified the signature and grant of a token submitted with the refreshtoken grant type, but not that the token was a refresh token. An unexpired access token for the same OAuth2 application and grant could be exchanged for a new access token and refresh token. Whoeve...

CVE-2026-101023 Gitea OAuth2 refresh token grant accepts access tokens

Gitea's OAuth2 token endpoint verified the signature and grant of a token submitted with the refreshtoken grant type, but not that the token was a refresh token. An unexpired access token for the same OAuth2 application and grant could be exchanged for a new access token and refresh token. Whoeve...

CVE-2026-73278

Gitea's OAuth2 and OpenID Connect sign-in paths do not require a WebAuthn challenge when WebAuthn is the account's only configured second factor. A party able to authenticate through the affected external identity flow can obtain a full session without the passkey verification enforced during...

EUVD-2026-93940

Gitea's OAuth2 and OpenID Connect sign-in paths do not require a WebAuthn challenge when WebAuthn is the account's only configured second factor. A party able to authenticate through the affected external identity flow can obtain a full session without the passkey verification enforced during...

CVE-2026-73278 Gitea WebAuthn bypass during OAuth and OIDC sign-in

Gitea's OAuth2 and OpenID Connect sign-in paths do not require a WebAuthn challenge when WebAuthn is the account's only configured second factor. A party able to authenticate through the affected external identity flow can obtain a full session without the passkey verification enforced during...

dovecot: Dovecot: Authentication bypass via incorrect OAuth2 token validation

A flaw was found in Dovecot. This vulnerability allows an attacker to bypass authentication by exploiting how OAuth2 tokens are validated. If an OAuth2 token response does not include a scope claim, Dovecot incorrectly uses the audience claim in its place for authorization checks. This can lead t...