CVE-2026-15814
CVE CVE-2026-15814EUVD EUVD-2026-77369Published 2026-09-14T10:39:45.000ZLast changed 2026-09-14T11:19:45.000ZCVSS 6.5
What the advisory describes
Mattermost versions 11.9.x <= 11.9.0, 11.8.x <= 11.8.4, 11.7.x <= 11.7.7, 10.11.x <= 10.11.22 fail to limit the amount of memory allocated when decoding uploaded image files which allows an authenticated user to cause excessive server memory consumption and potential denial of service via uploading a specially crafted image as a profile picture, channel file attachment, team icon, or custom brand image. Mattermost Advisory ID: MMSA-2026-00719
Source: EUVD (ENISA), in the words of the advisory.
Products the advisory names
These come from the advisory itself, not from any check we performed.
- Mattermost — Mattermost 11.7.0 ≤11.7.7; 10.11.0 ≤10.11.22; 11.8.0 ≤11.8.4; 11.9.0 ≤11.9.0
The versions shown are the advisory's own. Patchlage compares no version numbers and derives no judgement from them — which version is installed is something a person has to look up.
Carried in the product catalogue
An estate covering these products can be recorded in Patchlage. An advisory about them appears in the next morning's situation report.
- Mattermost — Mattermost
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