GHSA-VRH8-C9CM-WH8V ZITADEL: Unauthorized Token Privilege Escalation in OAuth2 Token Exchange

Summary A vulnerability in ZITADEL’s OAuth2 Token Exchange endpoint allows an authenticated user or client to exchange a low-privilege access token for a token with elevated permissions at a completely different application. This bypasses the intended authorization and separation policies...

CVE-2026-55837

dbt-mcp is a Model Context Protocol server for interacting with dbt. Prior to 1.20.0, the local OAuth helper in src/dbtmcp/oauth/fastapiapp.py exposes GET /dbtplatformcontext without authentication or Host validation after a user completes the dbt Platform OAuth flow. The endpoint returns the ful...

CVE-2026-73178 Apache Syncope: JWT Access Token takeover

Exposure of Sensitive Information to an Unauthorized Actor vulnerability in Apache Syncope. An administrator with adequate entitlements can get access via REST to the list of existing Access Tokens, including their signed JWT body. These values can be then used to perform further REST requests,...

CVE-2026-73178

The Apache Syncope identity management system is vulnerable to an Exposure of Sensitive Information to an Unauthorized Actor vulnerability. An administrator with sufficient entitlements can use the REST API to retrieve a list of existing Access Tokens , including their signed JWT bodies . These s...

EUVD-2026-76850

MCPHub before 1.0.32 contains an authentication bypass vulnerability in its embedded OAuth 2.0 authorization server where client authentication is disabled by default and PKCE enforcement is optional. Attackers who obtain an authorization code through interception can redeem it for access tokens...

CVE-2026-90474: Improper Authentication

MCPHub before 1.0.32 contains an authentication bypass vulnerability in its embedded OAuth 2.0 authorization server where client authentication is disabled by default and PKCE enforcement is optional. Attackers who obtain an authorization code through interception can redeem it for access tokens...

CVE-2026-19486: Server-Side Request Forgery (SSRF)

A Server-Side Request Forgery SSRF vulnerability in Google Cloud Gemini Enterprise Agent Platform App Builder versions prior to 2026-06-01 on Google Cloud Platform allows an unauthenticated attacker to leak the Compute Engine default service account access token. This vulnerability was patched on...

Open WebUI: Users denied by the OAuth role policy can still sign in via token exchange

Summary Open WebUI's OAuth token exchange endpoint issues a session for a provider access token without running the OAuth role management that the normal OAuth login callback runs. A user whose provider roles the login callback would refuse, or would demote, could still obtain a working session a...

Time-of-Check Time-of-Use (TOCTOU)

Apache CXF is vulnerable to Time-of-Check Time-of-Use TOCTOU. The vulnerability is due to a race condition in JCacheCodeDataProvider that allows the same authorization code to be redeemed concurrently, which allows an attacker to obtain multiple distinct and valid access tokens from a single...

CVE-2026-86762

Snipe-IT before 8.7.0 is vulnerable to an authentication bypass via its API middleware. The CheckUserIsActivated middleware is not applied to the api middleware group in app/Http/Kernel.php, and deactivating a user does not revoke existing Passport personal access tokens . A deactivated account t...

CVE-2026-86755 Snipe-IT 4.2.0 through 8.6.3 Permission Bypass via OAuth

Snipe-IT versions 4.2.0 through 8.6.3 expose Laravel Passport's auto-registered personal-access-token routes GET, POST, DELETE /oauth/personal-access-tokens with only 'web' and 'auth:web' middleware, without the self.api permission gate that Snipe-IT enforces on its own token endpoints /account/a...

CVE-2026-86755

Snipe-IT versions 4.2.0 through 8.6.3 expose Laravel Passport's auto-registered personal-access-token routes (/oauth/personal-access-tokens*) with only the web and auth:web middleware, lacking the self.api permission gate that Snipe-IT enforces on its own token endpoints. Any user with a valid we...

CVE-2026-86755 Snipe-IT 4.2.0 through 8.6.3 Permission Bypass via OAuth

Snipe-IT versions 4.2.0 through 8.6.3 expose Laravel Passport's auto-registered personal-access-token routes GET, POST, DELETE /oauth/personal-access-tokens with only 'web' and 'auth:web' middleware, without the self.api permission gate that Snipe-IT enforces on its own token endpoints /account/a...

CVE-2026-86755: Incorrect Authorization

Snipe-IT versions 4.2.0 through 8.6.3 expose Laravel Passport's auto-registered personal-access-token routes GET, POST, DELETE /oauth/personal-access-tokens with only 'web' and 'auth:web' middleware, without the self.api permission gate that Snipe-IT enforces on its own token endpoints /account/a...

Exploit for CVE-2026-73312

CVE-2026-73312 XenForo before 2.3.13 can leave an OAuth2 refr...

EUVD-2026-72783

XenForo before 2.3.13 contains a refresh token replay vulnerability that allows attackers to reuse a refresh token multiple times by exploiting the failure to mark tokens as consumed when the parent access token has expired. Attackers can repeatedly submit the same refresh token to generate...

CVE-2026-73312 XenForo < 2.3.13 Refresh Token Replay via Expired Access Token

XenForo before 2.3.13 contains a refresh token replay vulnerability that allows attackers to reuse a refresh token multiple times by exploiting the failure to mark tokens as consumed when the parent access token has expired. Attackers can repeatedly submit the same refresh token to generate...

CVE-2026-73312 XenForo < 2.3.13 Refresh Token Replay via Expired Access Token

XenForo before 2.3.13 contains a refresh token replay vulnerability that allows attackers to reuse a refresh token multiple times by exploiting the failure to mark tokens as consumed when the parent access token has expired. Attackers can repeatedly submit the same refresh token to generate...

PT-2026-87057

XenForo before 2.3.13 contains a refresh token replay vulnerability that allows attackers to reuse a refresh token multiple times by exploiting the failure to mark tokens as consumed when the parent access token has expired. Attackers can repeatedly submit the same refresh token to generate...

EUVD-2026-72540

Improper Authentication vulnerability in ash-project ashauthenticationoauth2server allows an unauthenticated attacker to register OAuth clients even when Dynamic Client Registration is gated by an initial access token. resolvesecret/3 in AshAuthentication.Oauth2Server reached through resolvesecre...