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CVE-2026-5755

CVE.org · Published

Historical CVEsJSONAI instructions

Record status
Published
Identifier year (not publication year)
2026
Source publication
Source updated
Imported by cveboard
Source snapshot
cve_2026-10-24_midnight_baseline ·

Plain text

CNA source text (English)

Denial of service via crafted TIFF file upload

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

Scoped product and version facts

Fix information unknown; no fixed version is derived here. Missing information does not prove that no fix exists.

Exploitation unknown; this catalogue does not assess exploitation.

Mattermost

Vendor
Mattermost
Product
Mattermost
Platforms
Unknown
Default status
unaffected
Mattermost · Scoped product and version facts
Version (version)Status (status)Version scheme (versionType)Exclusive end (lessThan)Inclusive end (lessThanOrEqual)Status changes (at → status)
11.6.0affectedsemverUnavailable11.6.0None listed
11.5.0affectedsemverUnavailable11.5.2None listed
11.5.0affectedsemverUnavailable11.5.3None listed
11.4.0affectedsemverUnavailable11.4.4None listed
10.11.0affectedsemverUnavailable10.11.14None listed
11.7.0unaffectedUnavailableUnavailableUnavailableNone listed
11.6.1unaffectedUnavailableUnavailableUnavailableNone listed
11.5.3unaffectedUnavailableUnavailableUnavailableNone listed
11.5.4unaffectedUnavailableUnavailableUnavailableNone listed
11.4.5unaffectedUnavailableUnavailableUnavailableNone listed
10.11.15unaffectedUnavailableUnavailableUnavailableNone listed