CVE-2026-3495
6 advisories.
Go/github.com/mattermost/mattermost/server/v8 CVE-2026-3495: low 3.8
Mattermost doesn't escape some variables that could contain malicious content during error page composition
Action: Upgrade github.com/mattermost/mattermost/server/v8 to 8.0.0-20260310115442-5a1ea95044d or later.
go get github.com/mattermost/mattermost/server/v8@v10.11.14go get github.com/mattermost/mattermost/server/v8@v11.5.2go get github.com/mattermost/mattermost/server/v8@v8.0.0-20260310115442-5a1ea95044dAffected
| introduced | fixed | last affected |
|---|---|---|
| 10.11.0 | 10.11.14 | - |
| 11.5.0 | 11.5.2 | - |
| 0 | 8.0.0-20260310115442-5a1ea95044d | - |
Fixed versions
| 10.11.14 | 11.5.2 | 8.0.0-20260310115442-5a1ea95044d |
Sources
- osv: GHSA-jx93-pf6x-874r
- https://nvd.nist.gov/vuln/detail/CVE-2026-3495
- https://github.com/mattermost/mattermost/commit/5a1ea95044dc2d1ca601bfe9a4c1bc17990f3872
- https://github.com/mattermost/mattermost
- https://mattermost.com/security-updates
CVE-2026-3495 · published · modified · JSON
Go/github.com/mattermost/mattermost-server CVE-2026-3495: low 3.8
Mattermost doesn't escape some variables that could contain malicious content during error page composition
Action: Upgrade github.com/mattermost/mattermost-server to 5.3.2-0.20260310115442-5a1ea95044dc or later.
go get github.com/mattermost/mattermost-server@v5.3.2-0.20260310115442-5a1ea95044dcAffected
| introduced | fixed | last affected |
|---|---|---|
| 0 | 5.3.2-0.20260310115442-5a1ea95044dc | - |
Fixed versions
| 5.3.2-0.20260310115442-5a1ea95044dc |
Sources
- osv: GHSA-jx93-pf6x-874r#Go/github.com/mattermost/mattermost-server
- https://nvd.nist.gov/vuln/detail/CVE-2026-3495
- https://github.com/mattermost/mattermost/commit/5a1ea95044dc2d1ca601bfe9a4c1bc17990f3872
- https://github.com/mattermost/mattermost
- https://mattermost.com/security-updates
CVE-2026-3495 · published · modified · JSON
Go/github.com/mattermost/mattermost-server CVE-2026-3495: unknown
Mattermost doesn't escape some variables that could contain malicious content during error page composition in github.com/mattermost/mattermost-server
Action: Upgrade github.com/mattermost/mattermost-server to 10.11.14+incompatible or later.
go get github.com/mattermost/mattermost-server@v10.11.14+incompatiblego get github.com/mattermost/mattermost-server@v11.5.2+incompatibleAffected
| introduced | fixed | last affected |
|---|---|---|
| 10.11.0+incompatible | 10.11.14+incompatible | - |
| 11.5.0+incompatible | 11.5.2+incompatible | - |
Fixed versions
| 10.11.14+incompatible | 11.5.2+incompatible |
Sources
- osv: GO-2026-5484
- https://github.com/advisories/GHSA-jx93-pf6x-874r
- https://nvd.nist.gov/vuln/detail/CVE-2026-3495
- https://github.com/mattermost/mattermost/commit/5a1ea95044dc2d1ca601bfe9a4c1bc17990f3872
- https://mattermost.com/security-updates
CVE-2026-3495 · published · modified · JSON
Go/github.com/mattermost/mattermost-server/v5 CVE-2026-3495: unknown
Mattermost doesn't escape some variables that could contain malicious content during error page composition in github.com/mattermost/mattermost-server
Action: No fix published. Pin and monitor.
Affected
| introduced | fixed | last affected |
|---|---|---|
| 0 | - | - |
Fixed versions
No fixed version in the source.
Sources
- osv: GO-2026-5484#Go/github.com/mattermost/mattermost-server/v5
- https://github.com/advisories/GHSA-jx93-pf6x-874r
- https://nvd.nist.gov/vuln/detail/CVE-2026-3495
- https://github.com/mattermost/mattermost/commit/5a1ea95044dc2d1ca601bfe9a4c1bc17990f3872
- https://mattermost.com/security-updates
CVE-2026-3495 · published · modified · JSON
Go/github.com/mattermost/mattermost-server/v6 CVE-2026-3495: unknown
Mattermost doesn't escape some variables that could contain malicious content during error page composition in github.com/mattermost/mattermost-server
Action: No fix published. Pin and monitor.
Affected
| introduced | fixed | last affected |
|---|---|---|
| 0 | - | - |
Fixed versions
No fixed version in the source.
Sources
- osv: GO-2026-5484#Go/github.com/mattermost/mattermost-server/v6
- https://github.com/advisories/GHSA-jx93-pf6x-874r
- https://nvd.nist.gov/vuln/detail/CVE-2026-3495
- https://github.com/mattermost/mattermost/commit/5a1ea95044dc2d1ca601bfe9a4c1bc17990f3872
- https://mattermost.com/security-updates
CVE-2026-3495 · published · modified · JSON
Go/github.com/mattermost/mattermost/server/v8 CVE-2026-3495: unknown
Mattermost doesn't escape some variables that could contain malicious content during error page composition in github.com/mattermost/mattermost-server
Action: No fix published. Pin and monitor.
Affected
| introduced | fixed | last affected |
|---|---|---|
| 0 | - | - |
Fixed versions
No fixed version in the source.
Sources
- osv: GO-2026-5484#Go/github.com/mattermost/mattermost/server/v8
- https://github.com/advisories/GHSA-jx93-pf6x-874r
- https://nvd.nist.gov/vuln/detail/CVE-2026-3495
- https://github.com/mattermost/mattermost/commit/5a1ea95044dc2d1ca601bfe9a4c1bc17990f3872
- https://mattermost.com/security-updates
CVE-2026-3495 · published · modified · JSON