CVE-2026-93851

The record

Mattermost versions 11.9.x <= 11.9.1, 11.8.x <= 11.8.5, 11.7.x <= 11.7.10 fail to validate the target post ID in the Agents plugin's mention reminder component, which allows an authenticated user who can post in a channel visible to a system administrator to cause the administrator's browser to send an unintended API request, resulting in replacement of an installed plugin and code execution on the server, via a crafted post containing a forged mention reminder that the administrator clicks. Mattermost Advisory ID: MMSA-2026-00742

Affected packages

Related vulnerabilities

• CVE-2026-61725 sevenz-rust2 is a Rust-native 7z compressor and `decompress`or. CWE-22
• CVE-2026-62965 SABnzbd is an open source automated Usenet download tool. CWE-22
• CVE-2026-119342 Stirling-PDF is a locally hosted web application that facilitates various operations on… CWE-22
• CVE-2026-119328 Immich is a high-performance self-hosted photo and video management solution. CWE-22
• CVE-2026-116249 In server mode pgAdmin 4 resolves a server's password file, SSL certificate, key, CRL and… CWE-22
• CVE-2026-116240 In server mode pgAdmin 4 validates a path into the user's storage directory with… CWE-22
• CVE-2026-62331 praktor is a multi-agent Claude Code orchestrator with Telegram input and output, Docker… CWE-22
• CVE-2026-115604 Subscriber Arbitrary File Deletion in SureDash <= 1.12.3 versions. CWE-22