Description

Mattermost versions 11.3.x <= 11.3.0, 11.2.x <= 11.2.2, 10.11.x <= 10.11.10 fail to canonicalize IPv4-mapped IPv6 addresses before reserved IP validation which allows an attacker to perform SSRF attacks against internal services via IPv4-mapped IPv6 literals (e.g., [::ffff:127.0.0.1]).. Mattermost Advisory ID: MMSA-2026-00585

INFO

Published Date :

2026-03-16T14:53:31.280Z

Last Modified :

2026-03-16T18:38:07.619Z

Source :

Mattermost
AFFECTED PRODUCTS

The following products are affected by CVE-2026-2455 vulnerability.

Vendors Products
Mattermost
  • Mattermost
  • Mattermost Server
REFERENCES

Here, you will find a curated list of external links that provide in-depth information to CVE-2026-2455.

URL Resource
https://mattermost.com/security-updates cve-icon cve-icon
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