GHSA-WVCV-9XPM-7MQC Mattermost doesn't enforce slash command trigger-word uniqueness during command updates

Mattermost versions 11.5.x = 11.5.1, 10.11.x = 10.11.13, 11.4.x = 11.4.3 Fail to enforce slash command trigger-word uniqueness during command updates which allows an authenticated team member with Manage Own Slash Commands permission to hijack and impersonate existing system or custom slash...

Mattermost doesn't validate the Host header when constructing response URLs for custom slash command

Mattermost versions 11.5.x = 11.5.1, 10.11.x = 10.11.13 fail to validate the Host header when constructing response URLs for custom slash commands which allows an authenticated attacker to redirect slash command responses to an attacker-controlled server via a spoofed Host header.. Mattermost...

Mattermost doesn't enforce slash command trigger-word uniqueness during command updates

Mattermost versions 11.5.x = 11.5.1, 10.11.x = 10.11.13, 11.4.x = 11.4.3 Fail to enforce slash command trigger-word uniqueness during command updates which allows an authenticated team member with Manage Own Slash Commands permission to hijack and impersonate existing system or custom slash...

CLSA-2026-1779096552 Fix CVE(s): CVE-2025-13836, CVE-2026-4519

SECURITY UPDATE: memory denial of service via attacker-controlled Content-Length in http.client - debian/patches/CVE-2025-13836.patch: rewrite Lib/http/client.py saferead to read large responses in geometrically-growing chunks bounded by MINREADBUFSIZE 1 MiB, preventing OOM when a malicious serve...

CVE-2026-6902

A Remote Code Execution vulnerability in P4 Helix Core Server's Command-Line Client, prior to the 2025.2 Patch 2, has been fixed to address potential security risks...

CVE-2026-6333

Mattermost versions 11.5.x = 11.5.1, 10.11.x = 10.11.13 fail to validate the Host header when constructing response URLs for custom slash commands which allows an authenticated attacker to redirect slash command responses to an attacker-controlled server via a spoofed Host header.. Mattermost...

CVE-2026-28732

Mattermost versions 11.5.x = 11.5.1, 10.11.x = 10.11.13, 11.4.x = 11.4.3 Fail to enforce slash command trigger-word uniqueness during command updates which allows an authenticated team member with Manage Own Slash Commands permission to hijack and impersonate existing system or custom slash...

CVE-2026-3117

Mattermost Plugins versions =11.5 11.1.5 10.13.11 11.3.4.0 fail to properly check for permissions when processing commands in the Gitlab plugin which allows normal users to uninstall instances or setup webhook connections via the gitlab instance option or the /gitlab webhook option commands...

CVE-2026-28732 Slash command trigger-word update allowed command hijacking

Mattermost versions 11.5.x = 11.5.1, 10.11.x = 10.11.13, 11.4.x = 11.4.3 Fail to enforce slash command trigger-word uniqueness during command updates which allows an authenticated team member with Manage Own Slash Commands permission to hijack and impersonate existing system or custom slash...

EUVD-2026-30760

Mattermost versions 11.5.x = 11.5.1, 10.11.x = 10.11.13, 11.4.x = 11.4.3 Fail to enforce slash command trigger-word uniqueness during command updates which allows an authenticated team member with Manage Own Slash Commands permission to hijack and impersonate existing system or custom slash...

CVE-2026-28732

Mattermost fixes are for versions 11.5.x (up to 11.5.1), 10.11.x (up to 10.11.13), and 11.4.x (up to 11.4.3). The issue is a failure to enforce slash command trigger-word uniqueness during command updates, allowing an authenticated team member with Manage Own Slash Commands permission to hijack o...

CVE-2026-28732 Slash command trigger-word update allowed command hijacking

Mattermost versions 11.5.x = 11.5.1, 10.11.x = 10.11.13, 11.4.x = 11.4.3 Fail to enforce slash command trigger-word uniqueness during command updates which allows an authenticated team member with Manage Own Slash Commands permission to hijack and impersonate existing system or custom slash...

CVE-2026-28732

Mattermost versions 11.5.x = 11.5.1, 10.11.x = 10.11.13, 11.4.x = 11.4.3 Fail to enforce slash command trigger-word uniqueness during command updates which allows an authenticated team member with Manage Own Slash Commands permission to hijack and impersonate existing system or custom slash...

SUSE-SU-2026:1970-1 Security update for php-composer2

This update for php-composer2 fixes the following issues - CVE-2026-40176: command injection via malicious Perforce repository definition bsc1262254. - CVE-2026-40261: command injection via malicious Perforce source reference/url bsc1262255. Changes for php-composer2: - version update to 2.2.27...

CVE-2026-3117 Instance and webhook GitLab plugin commands were able to be run by non-admin users

Mattermost Plugins versions =11.5 11.1.5 10.13.11 11.3.4.0 fail to properly check for permissions when processing commands in the Gitlab plugin which allows normal users to uninstall instances or setup webhook connections via the gitlab instance option or the /gitlab webhook option commands...

Security update for valkey

This update for valkey fixes the following issues CVE-2026-23479: use-after-free in unblock client flow may lead to remote code execution bsc1264164. CVE-2026-23631: Lua use-after-free via the master-replica synchronization mechanism may lead to remote code execution bsc1264165. CVE-2026-25243:...

SUSE-SU-2026:1950-1 Security update for valkey

This update for valkey fixes the following issues - CVE-2026-23479: use-after-free in unblock client flow may lead to remote code execution bsc1264164. - CVE-2026-23631: Lua use-after-free via the master-replica synchronization mechanism may lead to remote code execution bsc1264165. -...

SUSE-SU-2026:1949-1 Security update for valkey

This update for valkey fixes the following issues - CVE-2026-23479: use-after-free in unblock client flow may lead to remote code execution bsc1264164. - CVE-2026-23631: Lua use-after-free via the master-replica synchronization mechanism may lead to remote code execution bsc1264165. -...

Security update for valkey

This update for valkey fixes the following issues CVE-2026-23479: use-after-free in unblock client flow may lead to remote code execution bsc1264164. CVE-2026-23631: Lua use-after-free via the master-replica synchronization mechanism may lead to remote code execution bsc1264165. CVE-2026-25243:...

Security update for python310

This update for python310 fixes the following issues Security issues: CVE-2026-1502: HTTP client proxy tunnel headers not validated for CR/LF bsc1261969. CVE-2026-3446: base64 decoding stops at first padded quad by default bsc1261970. CVE-2026-4786: incomplete mitigation of , %action expansion fo...