CVE-2026-48491
4 advisories.
Go/github.com/traefik/traefik/v2 CVE-2026-48491: critical 10
Traefik: SNICheck ignores wildcard TLSOptions mappings, allowing domain-fronted mTLS bypass
Action: Upgrade github.com/traefik/traefik/v2 to 2.11.48 or later.
go get github.com/traefik/traefik/v2@v2.11.48Affected
| introduced | fixed | last affected |
|---|---|---|
| 0 | 2.11.48 | - |
Fixed versions
| 2.11.48 |
Sources
- osv: GHSA-5r4w-85f3-pw66
- https://github.com/traefik/traefik/security/advisories/GHSA-5r4w-85f3-pw66
- https://nvd.nist.gov/vuln/detail/CVE-2026-48491
- https://access.redhat.com/errata/RHSA-2026:62260
- https://access.redhat.com/security/cve/CVE-2026-48491
- https://bugzilla.redhat.com/show_bug.cgi?id=2491923
- https://github.com/traefik/traefik
- https://github.com/traefik/traefik/releases/tag/v2.11.48
- https://github.com/traefik/traefik/releases/tag/v3.6.19
- https://github.com/traefik/traefik/releases/tag/v3.7.3
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-48491.json
CVE-2026-48491 · published · modified · JSON
Go/github.com/traefik/traefik/v3 CVE-2026-48491: critical 10
Traefik: SNICheck ignores wildcard TLSOptions mappings, allowing domain-fronted mTLS bypass
Action: Upgrade github.com/traefik/traefik/v3 to 3.7.3 or later.
go get github.com/traefik/traefik/v3@v3.7.3Affected
| introduced | fixed | last affected |
|---|---|---|
| 3.7.0 | 3.7.3 | - |
Fixed versions
| 3.7.3 |
Sources
- osv: GHSA-5r4w-85f3-pw66#Go/github.com/traefik/traefik/v3
- https://github.com/traefik/traefik/security/advisories/GHSA-5r4w-85f3-pw66
- https://nvd.nist.gov/vuln/detail/CVE-2026-48491
- https://access.redhat.com/errata/RHSA-2026:62260
- https://access.redhat.com/security/cve/CVE-2026-48491
- https://bugzilla.redhat.com/show_bug.cgi?id=2491923
- https://github.com/traefik/traefik
- https://github.com/traefik/traefik/releases/tag/v2.11.48
- https://github.com/traefik/traefik/releases/tag/v3.6.19
- https://github.com/traefik/traefik/releases/tag/v3.7.3
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-48491.json
CVE-2026-48491 · published · modified · JSON
Go/github.com/traefik/traefik/v2 CVE-2026-48491: unknown
Traefik: SNICheck ignores wildcard TLSOptions mappings in github.com/traefik/traefik
Action: Upgrade github.com/traefik/traefik/v2 to 2.11.48 or later.
go get github.com/traefik/traefik/v2@v2.11.48Affected
| introduced | fixed | last affected |
|---|---|---|
| 0 | 2.11.48 | - |
Fixed versions
| 2.11.48 |
Sources
- osv: GO-2026-5152
- https://github.com/traefik/traefik/security/advisories/GHSA-5r4w-85f3-pw66
- https://github.com/traefik/traefik/releases/tag/v3.7.3
- https://github.com/traefik/traefik/releases/tag/v3.6.19
- https://github.com/traefik/traefik/releases/tag/v2.11.48
CVE-2026-48491 · published · modified · JSON
Go/github.com/traefik/traefik/v3 CVE-2026-48491: unknown
Traefik: SNICheck ignores wildcard TLSOptions mappings in github.com/traefik/traefik
Action: Upgrade github.com/traefik/traefik/v3 to 3.7.3 or later.
go get github.com/traefik/traefik/v3@v3.7.3Affected
| introduced | fixed | last affected |
|---|---|---|
| 3.7.0 | 3.7.3 | - |
Fixed versions
| 3.7.3 |
Sources
- osv: GO-2026-5152#Go/github.com/traefik/traefik/v3
- https://github.com/traefik/traefik/security/advisories/GHSA-5r4w-85f3-pw66
- https://github.com/traefik/traefik/releases/tag/v3.7.3
- https://github.com/traefik/traefik/releases/tag/v3.6.19
- https://github.com/traefik/traefik/releases/tag/v2.11.48
CVE-2026-48491 · published · modified · JSON