SEPTEMBER 15, 2026
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Case File

CVE-2026-86348

MEDIUM · CVSS 4.3

Source: NVD + CISA KEV + EPSS · Published 2026-09-14 · Last synced 2026-09-15

CyberRota Analysis

AI-Generated

Mattermost versions up to 11.9, including specific earlier versions, are vulnerable to a denial-of-service condition due to improper handling of panics, allowing authenticated users to crash the plugin through malformed post-action requests. This vulnerability could disrupt service availability and impact user experience. Organizations using affected Mattermost versions should prioritize patching to mitigate potential service interruptions.

CVE
CVE-2026-86348
Severity
MEDIUM
CVSS
4.3
EPSS
N/A

Original NVD Description

Mattermost versions <=11.9 11.0.9 11.4.8 11.7.7 10.22.11.0 fail to recover from handler panics, which allows an authenticated user to crash the plugin via a post-action request with an unexpected field type.. Mattermost Advisory ID: MMSA-2026-00701