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CVE-2026-54762: Traefik is an HTTP reverse proxy and load balancer

49
This week
HIGH 8.6REMOTEUPGRADE

CVE-2026-54762 is a high-severity flaw (CVSS 8.6) affecting traefik. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Traefik is an HTTP reverse proxy and load balancer. From 3.7.0-ea.1 until 3.7.5, there is a medium severity vulnerability in Traefik's Kubernetes Ingress NGINX provider that causes affected routes to fail open. When an Ingress explicitly enables BasicAuth or DigestAuth through the supported nginx.ingress.kubernetes.io/auth-type and auth-secret annotations, but the referenced auth Secret cannot be resolved or parsed, Traefik logs the resolution er

Why this priority

  • High severity
  • Public exploit reference
  • Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score8.6 (High)
Attack vectorNetwork (remote)
Attack complexityLow
Privileges neededNone
User interactionNone
EPSS exploit chance0.4% (top 63%)
CISA exploited listNo
WeaknessCWE-636, CWE-693
Published2026-06-23
Last modified2026-06-26
Publisher (CNA): GitHub, Inc. · Vendor: traefik

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Last updated 2026-06-26 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

traefik traefik UPGRADE
Affected: >= 3.7.0 and < 3.7.5
Fixed in: 3.7.5
Safe to downgrade to: a release before 3.7.0
1. Check installed version
apt-cache policy traefik || rpm -q traefik || traefik --version
2. UPGRADE to 3.7.5 (Debian / Ubuntu)
sudo apt update && sudo apt install --only-upgrade traefik
2. UPGRADE (RHEL / Amazon Linux / Fedora)
sudo dnf upgrade traefik
Note
Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.
3. If no update is available yet, DOWNGRADE to a release before 3.7.0 (Debian / Ubuntu)
apt-cache madison traefik sudo apt install traefik=<VERSION_BEFORE_3.7.0> sudo apt-mark hold traefik
3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)
dnf --showduplicates list traefik sudo dnf downgrade traefik-<VERSION_BEFORE_3.7.0> sudo dnf versionlock add traefik
Downgrade risk
Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.
After downgrade
Restart the service, and keep the package held until a fixed release ships.
Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-54762?

traefik: upgrade to 3.7.5. Exact commands for each OS are on this page.

Is CVE-2026-54762 being exploited?

CVE-2026-54762 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-54762 affect?

CVE-2026-54762 affects traefik. Severity is high (CVSS 8.6). Traefik is an HTTP reverse proxy and load balancer. From 3.7.0-ea.1 until 3.7.5, there is a medium severity vulnerability in Traefik's Kubernetes Ingress NGINX provider that causes affected routes to fail open. When an Ingress explicitly en

How urgent is CVE-2026-54762?

Priority 49/100. High severity; Public exploit reference; Remotely exploitable, no login, no user action

Software pages

nginx vulnerabilities · Kubernetes vulnerabilities · Traefik vulnerabilities

Related CVEs

References

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