CVE-2026-93848

Published Oct 26, 2026

Last updated 5 days ago

Overview

Description
Mattermost versions 11.7.x <= 11.7.10 fail to apply outbound internal-connection filtering to the OpenID discovery endpoint request which allows a System Administrator to determine whether internal addresses and ports are reachable from the server via an unauthenticated login request that triggers the discovery fetch.. Mattermost Advisory ID: MMSA-2026-00774
Source
responsibledisclosure@mattermost.com
NVD status
Analyzed
Products
mattermost_server

Risk scores

CVSS 3.1

Type
Secondary
Base score
2.7
Impact score
1.4
Exploitability score
1.2
Vector string
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:N/A:N
Severity
LOW

Weaknesses

responsibledisclosure@mattermost.com
CWE-918

Social media

Hype score
Not currently trending

Configurations

References

Sources include official advisories and independent security research.