GHSA-2G8V-GRQ3-HQ2G Mattermost doesn't enforce administrator authorization on the {{setDefaultInstance}} call within the {{/gitlab connect}} command handler

Mattermost versions 11.7.x slash command.. Mattermost Advisory ID: MMSA-2026-00644...

CVE-2026-6673

Mattermost versions 11.7.x = 11.7.0, 11.6.x = 11.6.2, 11.5.x = 11.5.5, 10.11.x = 10.11.17 fail to authenticate Atlassian Connect installed callbacks, allowing a remote unauthenticated attacker to inject a rogue sharedSecret and disrupt the Jira integration via POST to /ac/installed during the...

CVE-2026-5139

Mattermost versions 11.7.x slash command.. Mattermost Advisory ID: MMSA-2026-00644...

EUVD-2026-38249

Mattermost versions 11.7.x = 11.7.0, 11.6.x = 11.6.2, 11.5.x = 11.5.5, 10.11.x = 10.11.17 fail to authenticate Atlassian Connect installed callbacks, allowing a remote unauthenticated attacker to inject a rogue sharedSecret and disrupt the Jira integration via POST to /ac/installed during the...

CVE-2026-6673 Mattermost Jira plugin had unauthenticated {{/ac/installed}} lifecycle callback during pending Jira Cloud install

Mattermost versions 11.7.x = 11.7.0, 11.6.x = 11.6.2, 11.5.x = 11.5.5, 10.11.x = 10.11.17 fail to authenticate Atlassian Connect installed callbacks, allowing a remote unauthenticated attacker to inject a rogue sharedSecret and disrupt the Jira integration via POST to /ac/installed during the...

CVE-2026-5139 GitLab Plugin Allows Non-Admin Users to Modify Default Instance Configuration

Mattermost versions 11.7.x slash command.. Mattermost Advisory ID: MMSA-2026-00644...

EUVD-2026-38246

Mattermost versions 11.7.x slash command.. Mattermost Advisory ID: MMSA-2026-00644...

BIT-MONGODB-2026-9742 Authenticate command with specific mechanism parameter can trigger server crash

When OIDC authentication is enabled in configuration, clients may set specific values in the "mechanism" parameter of the "authenticate" command that lead to server crash. The authenticate command is accessible to unauthenticated clients, leading to pre-auth denial-of-service in affected product...

Amazon Linux 2023 : ecs-service-connect-agent (ALAS2023-2026-1893)

It is, therefore, affected by a vulnerability as referenced in the ALAS2023-2026-1893 advisory. A denial-of-service vulnerability was found in Envoy's HTTP/2 HPACK header compression implementation. A remote attacker could send a specially crafted HTTP/2 request that triggers disproportionately...

PT-2026-51316

Name of the Vulnerable Software and Affected Versions Mattermost version 11.7.0 Mattermost version 11.6.2 Mattermost version 11.5.5 Mattermost version 10.11.17 Description Remote unauthenticated attackers can inject a rogue sharedSecret and disrupt the Jira integration. This occurs during the...

PT-2026-51304

Name of the Vulnerable Software and Affected Versions Mattermost version 11.7.0 Mattermost version 11.6.2 Mattermost version 11.5.5 Mattermost version 10.11.17 Description Improper authorization in the GitLab connect command handler allows any authenticated user to overwrite the global default...

CVE-2026-6673: Missing Authentication for Critical Function

Mattermost versions 11.7.x = 11.7.0, 11.6.x = 11.6.2, 11.5.x = 11.5.5, 10.11.x = 10.11.17 fail to authenticate Atlassian Connect installed callbacks, allowing a remote unauthenticated attacker to inject a rogue sharedSecret and disrupt the Jira integration via POST to /ac/installed during the...

PT-2026-61144

Name of the Vulnerable Software and Affected Versions Linux kernel affected versions not specified Description An issue exists in AppArmor where the sendmsg and sendto functions, when used with the MSG FASTOPEN flag, combine the actions of connect2 and write2 to open a connection during the SYN...

CVE-2026-5139: Missing Authorization

Mattermost versions 11.7.x = 11.7.0, 11.6.x = 11.6.2, 11.5.x = 11.5.5, 10.11.x = 10.11.17 fail to enforce administrator authorization on the setDefaultInstance call within the /gitlab connect command handler, which allows any authenticated user to overwrite the global default GitLab instance...

Amazon Linux 2 : ecs-service-connect-agent, --advisory ALAS2ECS-2026-126 (ALASECS-2026-126)

The version of ecs-service-connect-agent installed on the remote host is prior to v1.34.13.2-1. It is, therefore, affected by a vulnerability as referenced in the ALAS2ECS-2026-126 advisory. A denial-of-service vulnerability was found in Envoy's HTTP/2 HPACK header compression implementation. A...

CVE-2026-12796 BerriAI litellm SSO Authentication Flow ui_sso.py get_redirect_response_from_openid session expiration

A vulnerability was identified in BerriAI litellm up to 1.82.2. This impacts the function getredirectresponsefromopenid of the file litellm/proxy/managementendpoints/uisso.py of the component SSO Authentication Flow. The manipulation leads to session expiration. The attack is possible to be carri...

Improper Authentication

Overview Affected versions of this package are vulnerable to Improper Authentication in the OIDC authenticator. An attacker can gain access to the API by presenting a JWT that a shared identity provider issued for an unrelated service, because the token's audience aud claim is not validated. This...

GHSA-HCXC-WF8J-23HV OpenFGA: OIDC audience validation skipped when --authn-oidc-audience is unset

Description OpenFGA's OIDC authenticator skipped JWT audience aud validation when no audience was configured. In deployments where one identity provider issues tokens for multiple services, a token minted for an unrelated service could authenticate to OpenFGA. Preconditions This applies if the...

CVE-2026-44087

Insufficient Verification of Data Authenticity vulnerability in Apache APISIX. The openid-connect plugin under default configuration has an attack surface that allows the attacker to spoof identity headers allowing the attacker to get unauthorized access the protected resources. This issue affect...

CVE-2026-44087 Apache APISIX: Openid-connect plugin Identity Header Spoofing

Insufficient Verification of Data Authenticity vulnerability in Apache APISIX. The openid-connect plugin under default configuration has an attack surface that allows the attacker to spoof identity headers allowing the attacker to get unauthorized access the protected resources. This issue affect...