BIT-KEYCLOAK-2026-18215 Keycloak-services: keycloak-services: microsoft external access-token exchange bypasses configured tenant

Keycloak provides a way to let users log in using Microsoft accounts while restricting access to a specific organization tenant. A flaw was discovered where this restriction is ignored when using the token exchange feature. This means an attacker with a valid Microsoft token from a completely...

BIT-KEYCLOAK-2026-18214 Keycloak-services: keycloak-services: google external access-token exchange bypasses hosted-domain restriction

Keycloak allows users to log in using Google accounts and can be configured to only allow users from specific Google Workspace domains. A flaw was found where the token exchange feature, which allows swapping a Google token for a Keycloak token, does not check these domain restrictions. This mean...

CVE-2026-81036

Stalwart Mail Server does not compare an OAuth redirect target against any registered destination in its default configuration. The validation routine in crates/http/src/auth/oauth/registration.rs returns success immediately when the client-authentication requirement is disabled, and that...

Authorization Bypass

Keycloak is vulnerable to Authorization Bypass. The vulnerability is due to the token exchange feature ignoring tenant restrictions, where the restriction check is bypassed and an attacker with a valid Microsoft token from a different organization can gain access to the Keycloak realm...

CVE-2026-75542 OAuth token exchange grants repository scopes for organizations the principal cannot access

Incorrect Authorization vulnerability in the OAuth token endpoint in hexpm hexpm allows an API key holding the repositories permission to read another organization's private packages. When an API key is exchanged for a token through the OAuth clientcredentials grant, validatescopesagainstkey/2 in...

CVE-2026-75542 OAuth token exchange grants repository scopes for organizations the principal cannot access

Incorrect Authorization vulnerability in the OAuth token endpoint in hexpm hexpm allows an API key holding the repositories permission to read another organization's private packages. When an API key is exchanged for a token through the OAuth clientcredentials grant, validatescopesagainstkey/2 in...

EEF-CVE-2026-75542 OAuth token exchange grants repository scopes for organizations the principal cannot access

Summary Incorrect Authorization vulnerability in the OAuth token endpoint in hexpm hexpm allows an API key holding the repositories permission to read another organization's private packages. When an API key is exchanged for a token through the OAuth clientcredentials grant,...

EUVD-2026-63258

n8n before 1.123.69, 2.33.4, and 2.34.1 contains an SSRF protection bypass in the OAuth2 credential authorization-code-to-access-token exchange. While OAuth2 discovery and dynamic-client-registration requests use n8n's SSRF-protected HTTP client, the token exchange uses a separate client with no...

CVE-2026-77069 n8n before 1.123.69 SSRF Protection Bypass via OAuth2

n8n before 1.123.69, 2.33.4, and 2.34.1 contains an SSRF protection bypass in the OAuth2 credential authorization-code-to-access-token exchange. While OAuth2 discovery and dynamic-client-registration requests use n8n's SSRF-protected HTTP client, the token exchange uses a separate client with no...

CVE-2026-77069 n8n before 1.123.69 SSRF Protection Bypass via OAuth2

n8n before 1.123.69, 2.33.4, and 2.34.1 contains an SSRF protection bypass in the OAuth2 credential authorization-code-to-access-token exchange. While OAuth2 discovery and dynamic-client-registration requests use n8n's SSRF-protected HTTP client, the token exchange uses a separate client with no...

CVE-2026-77069

n8n (workflow automation platform) versions before 1.123.69 , 2.33.4 , and 2.34.1 contain an SSRF protection bypass in the OAuth2 authorization-code-to-access-token exchange. While discovery and dynamic-client-registration use n8n's SSRF-protected HTTP client, the token exchange uses a separate c...

CVE-2026-77069 n8n before 1.123.69 SSRF Protection Bypass via OAuth2

n8n before 1.123.69, 2.33.4, and 2.34.1 contains an SSRF protection bypass in the OAuth2 credential authorization-code-to-access-token exchange. While OAuth2 discovery and dynamic-client-registration requests use n8n's SSRF-protected HTTP client, the token exchange uses a separate client with no...

PT-2026-78925

Name of the Vulnerable Software and Affected Versions n8n versions prior to 1.123.69 n8n versions prior to 2.33.4 n8n versions prior to 2.34.1 Description An SSRF Server-Side Request Forgery protection bypass exists during the OAuth2 credential authorization-code-to-access-token exchange. While...

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n8n versions through 2.31.4 and version 2.32.0 contain an authentication bypass vulnerability in Token-Exchange embed login that can allow an attacker possessing a private key trusted by the target configuration to assume an existing user's account. The vulnerable email fallback path trusts an...

CVE-2026-72772

n8n before 2.32.1 and before 2.31.5 is vulnerable to account takeover via the Token Exchange Embed Login feature. When a validly-signed incoming token was matched to a local account by its email claim, the service did not verify that the email claim was verified, nor that the trusted key's...

CVE-2026-72772

n8n

CVE-2026-72772 n8n before 2.32.1 Authentication Bypass via Token Exchange

n8n before 2.32.1 and before 2.31.5 is vulnerable to account takeover via the Token Exchange Embed Login feature. When a validly-signed incoming token was matched to a local account by its email claim, the service did not verify that the email claim was verified, nor that the trusted key's...

EUVD-2026-56098

n8n before 2.32.1 and before 2.31.5 is vulnerable to account takeover via the Token Exchange Embed Login feature. When a validly-signed incoming token was matched to a local account by its email claim, the service did not verify that the email claim was verified, nor that the trusted key's...

CVE-2026-72772 n8n before 2.32.1 Authentication Bypass via Token Exchange

n8n before 2.32.1 and before 2.31.5 is vulnerable to account takeover via the Token Exchange Embed Login feature. When a validly-signed incoming token was matched to a local account by its email claim, the service did not verify that the email claim was verified, nor that the trusted key's...

CVE-2026-72772

n8n before 2.32.1 and before 2.31.5 is vulnerable to account takeover via the Token Exchange Embed Login feature. When a validly-signed incoming token was matched to a local account by its email claim, the service did not verify that the email claim was verified, nor that the trusted key's...