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-2026-67404

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...

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...

curl: curl: Information disclosure via OAuth2 bearer token leakage during HTTP(S) redirect

A flaw was found in curl. When an OAuth2 bearer token is used for an HTTPS transfer that redirects to a second URL, curl could unintentionally leak the token. This occurs if the second hostname has entries in the .netrc file, allowing the bearer token intended for the first host to be sent to the...

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...

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'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...

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'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...

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...

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'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...

Important: Red Hat Security Advisory: dovecot security, bug fix, and enhancement update

An update for dovecot is now available for Red Hat Enterprise Linux 8. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System CVSS base score, which gives a detailed severity rating, is available for each vulnerability from t...

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-2026-101023: Improper Authentication

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...