CVE-2026-56425

The Azure Active Directory AAD authentication implementation contained multiple weaknesses in its OAuth 2.0 authorization flow that could allow attackers to bypass important security guarantees provided by the protocol. The application used the PHP session identifier sessionid as the OAuth state...

EUVD-2026-38228

The Azure Active Directory AAD authentication implementation contained multiple weaknesses in its OAuth 2.0 authorization flow that could allow attackers to bypass important security guarantees provided by the protocol. The application used the PHP session identifier sessionid as the OAuth state...

CVE-2026-50631 Apache CXF: OAuth2: TOCTOU Race Condition in Refresh Token Processing

A race condition in AbstractOAuthDataProvider allows concurrent requests using the same Refresh Token to bypass single-use semantics and generate multiple valid Access Tokens, when 'recycleRefreshTokens' is set to false. A leaked refresh token can be replayed concurrently by multiple attackers or...

CVE-2026-50631

CVE-2026-50631 : A TOCTOU race condition in Apache CXF's AbstractOAuthDataProvider allows concurrent requests to reuse the same Refresh Token when recycleRefreshTokens is false, bypassing single-use semantics and generating multiple valid Access Tokens. This can enable token replay/abuse by multi...

GHSA-8M7C-HF24-5G47 NocoDB: OAuth Authorization Code Race Condition

Summary Two concurrent token-exchange requests using the same OAuth authorization code could each mint a distinct valid accesstoken, refreshtoken pair, breaking the single-use guarantee that PKCE relies on. Details The token-exchange flow read isused and called markAsUsed as an unconditional upda...

NocoDB: OAuth Authorization Code Race Condition

Summary Two concurrent token-exchange requests using the same OAuth authorization code could each mint a distinct valid accesstoken, refreshtoken pair, breaking the single-use guarantee that PKCE relies on. Details The token-exchange flow read isused and called markAsUsed as an unconditional upda...

GHSA-5X9F-6VG5-QG4M Omni has a TOCTOU race condition that allows multiple concurrent uses of a single-use SAML session token

Summary SAML.getSession internal/pkg/auth/interceptor/saml.go checks the Used flag on a SAMLAssertion resource and then marks it used in two separate state operations. Because the check and the update are not atomic, concurrent requests carrying the same saml-session token can both observe Used =...

Omni has a TOCTOU race condition that allows multiple concurrent uses of a single-use SAML session token

Summary SAML.getSession internal/pkg/auth/interceptor/saml.go checks the Used flag on a SAMLAssertion resource and then marks it used in two separate state operations. Because the check and the update are not atomic, concurrent requests carrying the same saml-session token can both observe Used =...

PT-2026-47084

Summary Two concurrent token-exchange requests using the same OAuth authorization code could each mint a distinct valid access token, refresh token pair, breaking the single-use guarantee that PKCE relies on. Details The token-exchange flow read is used and called markAsUsed as an unconditional...

Replay Attack

Overview org.keycloak:keycloak-server-spi-private is an open source identity and access management solution for modern applications and services. Affected versions of this package are vulnerable to Replay Attack through the RequiredActionFactory and required-action implementations in the...

Replay Attack

Overview org.keycloak:keycloak-services is an open source identity and access management solution for modern applications and services. Affected versions of this package are vulnerable to Replay Attack through the RequiredActionFactory and required-action implementations in the authentication flo...

CVE-2026-43930 Parse Server: MFA SMS one-time password accepted twice under concurrent login

Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js. Prior to 8.6.76 and 9.9.0-alpha.2, a race condition in the MFA SMS one-time password OTP login path allows two concurrent /login requests carrying the same OTP to both succeed and both receive...

GHSA-JPQ4-7FMQ-Q5FJ parse-server: MFA SMS one-time password accepted twice under concurrent login

Impact A race condition in the MFA SMS one-time password OTP login path allows two concurrent /login requests carrying the same OTP to both succeed and both receive valid session tokens, breaking the single-use property of the OTP. The vulnerability requires the attacker to already possess the...

EUVD-2026-22915

Mattermost versions 10.11.x = 10.11.12, 11.5.x = 11.5.0, 11.4.x = 11.4.2, 11.3.x = 11.3.2 fail to enforce atomic single-use consumption of guest magic link tokens, which allows an attacker with access to a valid magic link to establish multiple independent authenticated sessions via concurrent...

Mattermost has session spoofing due to lack of single-use consumption of guest magic link tokens enforcement

Mattermost versions 10.11.x = 10.11.12, 11.5.x = 11.5.0, 11.4.x = 11.4.2, 11.3.x = 11.3.2 fail to enforce atomic single-use consumption of guest magic link tokens, which allows an attacker with access to a valid magic link to establish multiple independent authenticated sessions via concurrent...

GHSA-MH4X-RMRX-3HP4 Mattermost has session spoofing due to lack of single-use consumption of guest magic link tokens enforcement

Mattermost versions 10.11.x = 10.11.12, 11.5.x = 11.5.0, 11.4.x = 11.4.2, 11.3.x = 11.3.2 fail to enforce atomic single-use consumption of guest magic link tokens, which allows an attacker with access to a valid magic link to establish multiple independent authenticated sessions via concurrent...

CVE-2026-3590

Mattermost versions 10.11.x = 10.11.12, 11.5.x = 11.5.0, 11.4.x = 11.4.2, 11.3.x = 11.3.2 fail to enforce atomic single-use consumption of guest magic link tokens, which allows an attacker with access to a valid magic link to establish multiple independent authenticated sessions via concurrent...

CVE-2026-3590

Mattermost versions 10.11.x = 10.11.12, 11.5.x = 11.5.0, 11.4.x = 11.4.2, 11.3.x = 11.3.2 fail to enforce atomic single-use consumption of guest magic link tokens, which allows an attacker with access to a valid magic link to establish multiple independent authenticated sessions via concurrent...

PT-2026-33054

Name of the Vulnerable Software and Affected Versions Mattermost versions 10.11.0 through 10.11.12 Mattermost version 11.5.0 Mattermost versions 11.4.0 through 11.4.2 Mattermost versions 11.3.0 through 11.3.2 Description Failure to enforce atomic single-use consumption of guest magic link tokens...

Mattermost 安全漏洞

Mattermost is an open-source collaboration platform developed by the American company Mattermost. Vulnerabilities exist in Mattermost versions 10.11.12 and earlier of the 10.11.x series, as well as versions 11.5.0 and earlier of the 11.5.x series, 11.4.2 and earlier of the 11.4.x series, and 11.3...