VDB
CVE-2026-3109
CVE-2026-3109
PUBLISHED
CVSS 2.2 LOW
Missing timestamp validation in Zoom webhook handler
Reported by mattermost · Published March 26, 2026
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
Fixed versions
Upgrade to a fixed version or later. Language registries are listed first, then Linux distributions, then vendor products.
| Package | Ecosystem | Fixed in |
|---|---|---|
| Mattermost | Mattermost | 10.11.11 |
Risk scores
CVSS 3.1
2.2
CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:L
Affected products
| Vendor | Product | Versions |
|---|---|---|
| Mattermost | Mattermost | 0, 11.5.0, 10.11.12 |
| Mattermost | Mattermost | 0, 11.5.0, 10.11.12 |
Timeline
- Mar 26, 2026 CVE Published
- Mar 27, 2026 Coalition ESS Score (2 in total, the first dated here)
- Mar 27, 2026 Security Advisory (2 in total, the first dated here)
- May 18, 2026 EPSS Score (30 in total, the first dated here)
- Jun 8, 2026 CVE Updated
Query this with the API
The same record, from the CLI:
vulnetix vdb vuln CVE-2026-3109
vulnetix vdb fixes CVE-2026-3109Or with curl, using the org id and key from your account page:
curl -s -H "Authorization: ApiKey ${VULNETIX_ORG_ID}:${VULNETIX_API_KEY}" \
"https://api.vdb.vulnetix.com/v2/vuln/CVE-2026-3109/fixes/registry"The Community plan is free and allows 50 queries a day. Get a free API key · API quickstart
References
- MMSA-2026-00584 vendor-advisory