Vulnerabilities CVE-2026-5755

CVE-2026-5755

Medium

Open

TLP:CLEAR

Denial of service via crafted TIFF file upload

NVD CVE.org

DDoS

AI Analysis

No AI analysis yet.

Description

Mattermost versions 11.6.x <= 11.6.0, 11.5.x <= 11.5.2, 11.5.x <= 11.5.3, 11.4.x <= 11.4.4, 10.11.x <= 10.11.14 fail to validate the TIFF IFD offset in the image header before allocating memory, which allows authenticated users with file upload or posting permissions to cause a denial of service (server OOM) via uploading a crafted TIFF file or posting a URL that serves one.. Mattermost Advisory ID: MMSA-2026-00648

Details

CVSS Score: 6.5
EPSS Score ⓘ: 0.25%

15.8th percentile
CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Confidence: 90%
Published: May 22, 2026
Last Modified: May 22, 2026

Notes

No notes yet. Click "Add Note" to create the first analysis note.

Opinions

No opinions yet. Be the first to assess this intelligence.