CVE-2026-20796
🗓️ 13 Feb 2026 10:30:03Reported by MattermostType 
cve🔗 web.nvd.nist.gov📰️ 3 Media mentions👁 46 Views
| Reporter | Title | Published | Views | Family All 20 |
|---|---|---|---|---|
 | CVE-2026-20796 | 13 Feb 202610:30 | – | attackerkb |
 | CVE-2026-20796 | 14 Feb 202618:10 | – | circl |
 | Mattermost security vulnerabilities | 13 Feb 202600:00 | – | cnnvd |
 | CVE-2026-20796 Time-of-check time-of-use vulnerability in common teams API | 13 Feb 202610:30 | – | cvelist |
 | Mattermost doesn't properly validate channel membership at the time of data retrieval | 13 Feb 202612:31 | – | github |
 | Mattermost Server 10.11.x <= 10.11.9 / 11.0.x <= 11.2.x Improper Access Control (MMSA-2025-00549) | 18 Feb 202600:00 | – | nessus |
 | CVE-2026-20796 | 13 Feb 202610:30 | – | mend |
 | CVE-2026-20796 | 13 Feb 202611:16 | – | nvd |
 | CVE-2026-20796 Time-of-check time-of-use vulnerability in common teams API | 13 Feb 202610:30 | – | osv_cve |
| GHSA-2XF7-HMF6-P64J Mattermost doesn't properly validate channel membership at the time of data retrieval | 13 Feb 202612:31 | – | osv_ghsa |
10
Node
[
{
"defaultStatus": "unaffected",
"product": "Mattermost",
"vendor": "Mattermost",
"versions": [
{
"lessThanOrEqual": "10.11.9",
"status": "affected",
"version": "10.11.0",
"versionType": "semver"
},
{
"version": "11.3.0",
"status": "unaffected"
},
{
"version": "10.11.10",
"status": "unaffected"
}
]
}
]| Source | Link |
|---|---|
| mattermost | www.mattermost.com/security-updates |
Data
Build on a solid foundation with Vulners data
We provide the essential building blocks for cybersecurity solutions with comprehensive, structured, and constantly updated vulnerability and exploits data
Api
Power your application with Vulners API
The Vulners REST API offers reliable, high-performance access to vulnerability intelligence, with 99.9% SLA uptime and CDN-backed data delivery for seamless global access
App
Assess and manage vulnerabilities with Vulners tools
Built on top of Vulners' database and SDK, end-user solutions give security professionals and developers lightweight and powerful tools for vulnerability remediation
17 Jun 2026 10:17Current
8.1High risk
Vulners AI Score8.1
CVSS 3.13.1
EPSS0.0022
SSVC