GHSA-44mv-jq72-gj49

ghsaUSosv

Mattermost fails to bound memory allocation when processing PSD image files

view advisory published 2026-03-16Licence: CC-BY-4.0

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

describes (1)

Related CVEs.

ID	severity	EPSS	exploitable	published
CVE-2026-26246US	—	0.22% (13th)	—	2026-03-16
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 t…

references

External citations — patches, advisories, analysis.

https://github.com/mattermost/mattermostPACKAGE
https://github.com/mattermost/mattermost/commit/38b413a27604e8721fbe008f8ec4b4e6c47ad4f0WEB
https://mattermost.com/security-updatesWEB
https://nvd.nist.gov/vuln/detail/CVE-2026-26246ADVISORY

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