Low severity3.1NVD Advisory· Published May 15, 2026· Updated May 18, 2026
CVE-2026-4053
CVE-2026-4053
Description
Mattermost versions 11.5.x <= 11.5.1, 10.11.x <= 10.11.13 fail to enforce the PostEditTimeLimit on non-message post fields which allows an authenticated user to modify post file attachments, props, and pin status after the edit window has expired via the post patch and update API endpoints.. Mattermost Advisory ID: MMSA-2026-00631
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
github.com/mattermost/mattermost-serverGo | >= 11.5.0, < 11.5.2 | 11.5.2 |
github.com/mattermost/mattermost-serverGo | >= 0.0.0-20250731163400-5b955468ea1e, < 0.0.0-20260414103857-b21ef302025e | 0.0.0-20260414103857-b21ef302025e |
Affected products
2cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:*+ 1 more
- cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:*range: >=10.11.0,<10.11.14
- (no CPE)range: >=11.5.x <=11.5.1, >=10.11.x <=10.11.13
Patches
Vulnerability mechanics
References
3- github.com/advisories/GHSA-hw87-6jcq-9f8qghsaADVISORY
- mattermost.com/security-updatesnvdVendor AdvisoryWEB
- nvd.nist.gov/vuln/detail/CVE-2026-4053ghsaADVISORY
News mentions
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