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mattermost/mattermost · Security

Mattermost fails to bound memory allocation when processing PSD image files

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GHSA ID
GHSA-44mv-jq72-gj49
CVE ID
CVE-2026-26246
Severity
medium
Published
Updated
CVSS
4.3 · CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
CVSS v3
4.3 · CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L

Description

Mattermost versions 11.3.x <= 11.3.0, 11.2.x <= 11.2.2, 10.11.x <= 10.11.10 fail to bound memory allocation when processing PSD image files which allows an authenticated attacker to cause server memory exhaustion and denial of service via uploading a specially crafted PSD file. Mattermost Advisory ID: MMSA-2026-00572

CWEs

  • CWE-789 · Memory Allocation with Excessive Size Value

References