Medium severity4.3NVD Advisory· Published Feb 13, 2026· Updated Jun 17, 2026
CVE-2026-22892
CVE-2026-22892
Description
Mattermost versions 11.1.x <= 11.1.2, 10.11.x <= 10.11.9, 11.2.x <= 11.2.1 fail to validate user permissions when creating Jira issues from Mattermost posts, which allows an authenticated attacker with access to the Jira plugin to read post content and attachments from channels they do not have access to via the /create-issue API endpoint by providing the post ID of an inaccessible post.. Mattermost Advisory ID: MMSA-2025-00550
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 | >= 11.2.0, < 11.2.2 | 11.2.2 |
github.com/mattermost/mattermost-serverGo | >= 11.1.0, < 11.1.3 | 11.1.3 |
github.com/mattermost/mattermost-serverGo | >= 10.11.0, < 10.11.10 | 10.11.10 |
Affected products
5cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:*+ 1 more
- cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:*range: >=10.11.0,<10.11.10
- (no CPE)range: 11.1.0
- ghsa-coords3 versionspkg:golang/github.com/mattermost/mattermost-serverpkg:rpm/opensuse/govulncheck-vulndb&distro=openSUSE%20Leap%2015.6pkg:rpm/opensuse/govulncheck-vulndb&distro=openSUSE%20Leap%2016.0
>= 11.2.0, < 11.2.2+ 2 more
- (no CPE)range: >= 11.2.0, < 11.2.2
- (no CPE)range: < 0.0.20260226T182644-150000.1.149.1
- (no CPE)range: < 0.0.20260723T184607-160000.1.1
Patches
Vulnerability mechanics
References
3- github.com/advisories/GHSA-9pj7-jh2r-87g8ghsaADVISORY
- mattermost.com/security-updatesnvdVendor AdvisoryWEB
- nvd.nist.gov/vuln/detail/CVE-2026-22892ghsaADVISORY
News mentions
0No linked articles in our index yet.