CVE-2026-6541
published 2026-07-13CVE-2026-6541: Mattermost versions 11.7.x <= 11.7.1, 11.6.x <= 11.6.4, 10.11.x <= 10.11.19 fail to restrict metric configuration changes to the playbook being saved, which…
PriorityP424medium4.3CVSS 3.1
AVNACLPRLUINSUCNILAN
EPSS
0.15%
4.9th percentile
Mattermost versions 11.7.x <= 11.7.1, 11.6.x <= 11.6.4, 10.11.x <= 10.11.19 fail to restrict metric configuration changes to the playbook being saved, which allows an authenticated user with team access to alter another user’s playbook metric settings via a crafted import or update request with a foreign metric ID. Mattermost Advisory ID: MMSA-2026-00653
Affected
6 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| mattermost | mattermost | 10.11.0 – 10.11.19 | — |
| mattermost | mattermost | 11.6.0 – 11.6.4 | — |
| mattermost | mattermost | 11.7.0 – 11.7.1 | — |
| mattermost | mattermost_server | >= 10.11.0 < 10.11.20 | 10.11.20 |
| mattermost | mattermost_server | >= 11.6.0 < 11.6.5 | 11.6.5 |
| mattermost | mattermost_server | >= 11.7.0 < 11.7.2 | 11.7.2 |
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VulDB
Mattermost up to 10.11.19/11.6.4/11.7.1 Playbook metric ID improper authentication (Nessus ID 327419)
vuldb·2026-07-18·CVSS 4.3
CVE-2026-6541 [MEDIUM] Mattermost up to 10.11.19/11.6.4/11.7.1 Playbook metric ID improper authentication (Nessus ID 327419)
A vulnerability marked as critical has been reported in Mattermost up to 10.11.19/11.6.4/11.7.1. Affected is an unknown function of the component Playbook. This manipulation of the argument metric ID causes improper authentication.
This vulnerability is registered as CVE-2026-6541. Remote exploitation of the attack is possible. No exploit is available.
GHSA
Woodpecker gRPC agent_id metadata can be spoofed- cross-tenant agent impersonation
ghsa·2026-07-14
CVE-2026-50141 [HIGH] CWE-290 Woodpecker gRPC agent_id metadata can be spoofed- cross-tenant agent impersonation
Woodpecker gRPC agent_id metadata can be spoofed- cross-tenant agent impersonation
### Impact
A vulnerability in Woodpecker CI's gRPC layer allowed any authenticated agent to impersonate any other agent on the same server by injecting a forged `agent_id` value into outgoing gRPC metadata. The server correctly verified the JWT token but then discarded the verified agent identity in favor of the client-supplied value.
### Patches
Direct patch: https://github.com/woodpecker-ci/woodpecker/pull/6567
Later proper fix: https://github.com/woodpecker-ci/woodpecker/pull/6569
### Workarounds
Disable org agents (`WOODPECKER_DISABLE_USER_AGENT_REGISTRATION=true`) and delete existing ones
### Resources
Public ref: https://github.com/woodpecker-ci/woodpecker/issues/6541
Private com: https://github.co
GHSA
Mattermost versions 11.7.x <= 11.7.1, 11.6.x <= 11.6.4, 10.11.x <= 10.11.19 fail to restrict metric configuration changes to the playbook being saved, which allows an authenticated user with team acce
ghsa_unreviewed·2026-07-13
CVE-2026-6541 [MEDIUM] CWE-639 Mattermost versions 11.7.x <= 11.7.1, 11.6.x <= 11.6.4, 10.11.x <= 10.11.19 fail to restrict metric configuration changes to the playbook being saved, which allows an authenticated user with team acce
Mattermost versions 11.7.x <= 11.7.1, 11.6.x <= 11.6.4, 10.11.x <= 10.11.19 fail to restrict metric configuration changes to the playbook being saved, which allows an authenticated user with team access to alter another user’s playbook metric settings via a crafted import or update request with a foreign metric ID. Mattermost Advisory ID: MMSA-2026-00653
No detection rules found.
No public exploits indexed.
No writeups or analysis indexed.
2026-07-13
Published