CVE-2026-13417
CVE CVE-2026-13417EUVD EUVD-2026-77376Published 2026-09-14T10:44:59.000ZLast changed 2026-09-14T11:19:44.000ZCVSS 4.3
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 validate the type of `fields.properties` on block creation which allows an authenticated user with editor access to a board to crash the Boards plugin worker and trigger a denial of service via a child block whose `fields.properties` is a non-object value. Mattermost Advisory ID: MMSA-2026-00710
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 10.11.0 ≤10.11.22; 11.8.0 ≤11.8.4; 11.9.0 ≤11.9.0; 11.7.0 ≤11.7.7
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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