Feed/CVE-2026-5755
CVE-2026-5755MEDIUMCVSS 6.5

Mattermost doesn't validate the TIFF IFD offset in the image header before allocating memory

Published May 26, 2026·Updated Jun 29, 2026

NVD 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

Affected Packages (1)

github.com/mattermost/mattermost-serverGO
Fixed in 11.6.1

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

References

View on NVD Search GitHub Search Google

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