CVE-2026-81921 In Concrete CMS 8.5.3 to 9,5,2, OAuth 2.0 Refresh-Token Grant Bypasses Account Status

Concrete CMS 8.5.3 through 9.5.2 enabled the OAuth 2.0 refresh-token grant using the unmodified upstream League grant, which issued new access tokens from a valid refresh token without re-checking the associated account's active status. A user who obtained a refresh token while active could...

CVE-2026-1609

CVE-2026-1609 affects Keycloak: when the JWT authorization grant preview feature is enabled and a user is disabled, Keycloak may not validate the user’s disabled status during JWT grant processing. A remote, low-privilege attacker can present an assertion token from an external IdP to obtain a JW...

Authentication Bypass by Primary Weakness

Overview Affected versions of this package are vulnerable to Authentication Bypass by Primary Weakness in the OAuth refresh token grant process. An attacker can maintain unauthorized access by using a valid refresh token associated with a deactivated account. Remediation Upgrade...

CVE-2026-9571

Mattermost CVE-2026-9571 affects versions 11.7.x <= 11.7.2, 11.6.x <= 11.6.4, and 10.11.x

CVE-2026-9571 Deactivated user accounts can continue to obtain valid OAuth access tokens via refresh token grant in Mattermost

Mattermost versions 11.7.x = 11.7.2, 11.6.x = 11.6.4, 10.11.x = 10.11.19 fail to invalidate OAuth refresh tokens upon user account deactivation, which allows a deactivated user or an attacker in possession of a valid refresh token to obtain new functional access tokens via the OAuth refresh token...

CVE-2026-9571 Deactivated user accounts can continue to obtain valid OAuth access tokens via refresh token grant in Mattermost

Mattermost versions 11.7.x = 11.7.2, 11.6.x = 11.6.4, 10.11.x = 10.11.19 fail to invalidate OAuth refresh tokens upon user account deactivation, which allows a deactivated user or an attacker in possession of a valid refresh token to obtain new functional access tokens via the OAuth refresh token...

CVE-2026-9571 Deactivated user accounts can continue to obtain valid OAuth access tokens via refresh token grant in Mattermost

Mattermost versions 11.7.x = 11.7.2, 11.6.x = 11.6.4, 10.11.x = 10.11.19 fail to invalidate OAuth refresh tokens upon user account deactivation, which allows a deactivated user or an attacker in possession of a valid refresh token to obtain new functional access tokens via the OAuth refresh token...

Incorrect Authorization

Overview better-auth is a The most comprehensive authentication library for TypeScript. Affected versions of this package are vulnerable to Incorrect Authorization in the refreshtoken grant process of the legacy oidcProvider and mcp plugins, where confidential clients are not required to...

CVE-2026-9792

CVE-2026-9792 – Keycloak Client Policies bypass of ROPC block : A flaw in Keycloak’s Client Policies (org.keycloak.protocol.oidc) allows an unauthenticated attacker to obtain tokens via ROPC grants even when a policy blocks them. The issue occurs when certain condition providers (client-type, cli...

CVE-2025-32322

In onCreate of MediaProjectionPermissionActivity.java , there is a possible way to grant a malicious app a token enabling unauthorized screen recording capabilities due to improper input validation. This could lead to local escalation of privilege with no additional execution privileges needed...

CVE-2025-32322

In onCreate of MediaProjectionPermissionActivity.java , there is a possible way to grant a malicious app a token enabling unauthorized screen recording capabilities due to improper input validation. This could lead to local escalation of privilege with no additional execution privileges needed...