VDB
CVE-2026-3109
CVE-2026-3109
PUBLISHED
CVSS 2.200000047683716 LOW
Mattermost Plugins versions <=11.4 10.11.11.0 fail to validate webhook request timestamps which allows an attacker to corrupt Zoom meeting state in Mattermost via replayed webhook requests. Mattermost Advisory ID: MMSA-2026-00584
EPSS 0.02% · 3.5th percentile
Risk Scores
CVSS v3.1
2.200000047683716
CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:L
EPSS Score
0.02%
3.5th percentile
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Mattermost | Mattermost | 0, 11.5.0, 10.11.12 |
Timeline
- Mar 26, 2026 CVE Published
- Mar 27, 2026 Coalition ESS Score
- Mar 27, 2026 Security Advisory
- Mar 29, 2026 Security Advisory
- May 18, 2026 EPSS Score
- May 19, 2026 EPSS Score
- May 20, 2026 EPSS Score
- May 21, 2026 EPSS Score
- May 22, 2026 EPSS Score
- May 23, 2026 EPSS Score
- May 24, 2026 EPSS Score
- May 25, 2026 EPSS Score
References
- MMSA-2026-00584 vendor-advisory
- https://nvd.nist.gov/vuln/detail/CVE-2026-3109 advisory