CVE-2026-33433
Traefik Vulnerable to BasicAuth/DigestAuth Identity Spoofing via Non-Canonical headerField in github.com/traefik/traefik
EPSS 0.03%
Description
Traefik Vulnerable to BasicAuth/DigestAuth Identity Spoofing via Non-Canonical headerField in github.com/traefik/traefik
How to fix CVE-2026-33433
To remediate CVE-2026-33433, upgrade the affected package to a fixed version below.
- Go/github.com/traefik/traefik—no fix listed
- Go/github.com/traefik/traefik/v2—upgrade to 2.11.42 or later
- Go/github.com/traefik/traefik/v2—upgrade to 2.11.42 or later
- —upgrade to 3.6.12 or later
- —upgrade to 3.6.12 or later
Is CVE-2026-33433 being exploited?
Low — EPSS is 0.0%, meaning exploitation activity has not been observed at scale.
Affected packages (5)
- from 0
- from 0, < 2.11.42
- from 0, < 2.11.42
- >= 3.0.0-beta1, < 3.6.12
- >= 3.0.0-beta1, < 3.6.12, >= 3.7.0-ea.1, < 3.7.0-ea.3
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 4.0 | — | CVSS:4.0/AV:N/AC:H/AT:P/PR:H/UI:N/VC:N/VI:N/VA:N/SC:H/SI:H/SA:N |