VDB
GHSA-2v3w-6g35-5f9v
GHSA-2v3w-6g35-5f9v
PUBLISHED
CVSS 4.300000190734863 MEDIUM
Mattermost fails to properly validate User-Agent header tokens
Record from GitHub Advisory Database · Published March 16, 2026
github.com/mattermost/mattermost/server/v8 is fixed in 8.0.0-20260129181235-1346cf529aef and 8.0.0-20260129181235 (Go Modules)
Mattermost fails to properly validate User-Agent header tokens
Fixed versions
Upgrade to a fixed version or later. Language registries are listed first, then Linux distributions, then vendor products.
| Package | Ecosystem | Fixed in |
|---|---|---|
| github.com/mattermost/mattermost/server/v8 | Go Modules | 8.0.0-20260129181235-1346cf529aef, 8.0.0-20260129181235 |
| github.com/mattermost/mattermost-server | Go Modules | 11.3.1, 11.2.3, 10.11.11, 5.3.2-0.20260129181235-1346cf529aef, 5.3.2-0.20260129181235 |
Risk scores
CVSS 3.1
4.300000190734863
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
Affected products
| Vendor | Product | Versions |
|---|---|---|
| github.com | mattermost/mattermost/server/v8 | |
| github.com | mattermost/mattermost-server | 10.11.0-rc1, 11.2.0-rc1, 11.3.0-rc1 |
Timeline
- Mar 16, 2026 CVE Published
- Apr 30, 2026 Security Advisory
Query this with the API
The same record, from the CLI:
vulnetix vdb vuln GHSA-2v3w-6g35-5f9v
vulnetix vdb fixes GHSA-2v3w-6g35-5f9vOr with curl, using the org id and key from your account page:
curl -s -H "Authorization: ApiKey ${VULNETIX_ORG_ID}:${VULNETIX_API_KEY}" \
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