CVE-2026-4265

描述

Mattermost versions 11.3.x <= 11.3.0, 11.2.x <= 11.2.2, 10.11.x <= 10.11.10 fail to validate team-specific upload_file permissions which allows a guest user to post files in channels where they lack upload_file permission via uploading files in a team where they have permission and reusing the file metadata in a POST request to a different team. Mattermost Advisory ID: MMSA-2025-00553

受影響套件(6)

• Go/github.com/mattermost/mattermost-serverfrom 0, < 5.3.2-0.20260107144005-c7f6efdfb035
• Go/github.com/mattermost/mattermost-server>= 10.11.0-rc1+incompatible, < 10.11.11+incompatible, >= 11.2.0-rc1+incompatible, < 11.2.3+incompatible, >= 11.3.0-rc1+incompatible, < 11.3.1+incompatible
• Go/github.com/mattermost/mattermost-server/v5from 0
• Go/github.com/mattermost/mattermost-server/v6from 0
• Go/github.com/mattermost/mattermost/server/v8from 0, < 8.0.0-20260107144005-c7f6efdfb035
• Go/github.com/mattermost/mattermost/server/v8from 0, < 8.0.0-20260107144005-c7f6efdfb035

CVSS 分數

參考連結(5)

• ADVISORYhttps://github.com/advisories/GHSA-xpvf-6qcc-9jqc
• ADVISORYhttps://nvd.nist.gov/vuln/detail/CVE-2026-4265
• PATCHhttps://github.com/mattermost/mattermost
• WEBhttps://github.com/mattermost/mattermost/commit/c7f6efdfb035490f494b3177996ee5f4b278c988
• WEBhttps://mattermost.com/security-updates