CVE-2026-114636: Traefik v3.7.13 before v3.7.14 contains an access-control bypass in the Kubernetes Ingress NGINX provider, whe

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HIGH 8.7REMOTEWATCHLISTDOWNGRADE

CVE-2026-114636 is a high-severity flaw (CVSS 8.7) affecting traefik. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Traefik v3.7.13 before v3.7.14 contains an access-control bypass in the Kubernetes Ingress NGINX provider, where the HTTP router generated for ssl-passthrough Ingresses on non-TLS entry points never applies the Ingress's access-control annotations. Unauthenticated attackers reaching the HTTP entry point with the Ingress host can access backends protected by auth-type, auth-url, or whitelist-source-range annotations, with nothing logged.

Why this priority

High severity
Remotely exploitable, no login, no user action
On your watchlist

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	8.7 (High)
Attack vector	Network (remote)
Attack complexity	High
Privileges needed	None
User interaction	None
EPSS exploit chance	0.3% (top 83%)
CISA exploited list	No
Weakness	CWE-306
Published	2026-10-22
Last modified	2026-10-27

Publisher (CNA): VulnCheck · Vendor: traefik

Last updated 2026-10-27 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-10-22 02:16 UTCPublished CVE record published
2026-10-27 14:17 UTCUpdated Record last modified

traefik traefik DOWNGRADE

Affected: 3.7.13

Fixed in: no fixed release known

Safe to downgrade to: a release before 3.7.13

1. Check installed version

apt-cache policy traefik || rpm -q traefik || traefik --version

2. No fixed release: DOWNGRADE to a release before 3.7.13 (Debian / Ubuntu)

apt-cache madison traefik sudo apt install traefik=<VERSION_BEFORE_3.7.13> sudo apt-mark hold traefik

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list traefik sudo dnf downgrade traefik-<VERSION_BEFORE_3.7.13> 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-2026-114636?

traefik: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2026-114636 being exploited?

CVE-2026-114636 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-2026-114636 affect?

CVE-2026-114636 affects traefik. Severity is high (CVSS 8.7). Traefik v3.7.13 before v3.7.14 contains an access-control bypass in the Kubernetes Ingress NGINX provider, where the HTTP router generated for ssl-passthrough Ingresses on non-TLS entry points never applies the Ingress's access-control anno

How urgent is CVE-2026-114636?

Priority 45/100. High severity; Remotely exploitable, no login, no user action; On your watchlist

Software pages

nginx vulnerabilities · Kubernetes vulnerabilities · Traefik vulnerabilities

Related CVEs

CVE-2026-114635 HIGH 8.7 UPGRADE Traefik before v2.11.58 and v3.7.14 contains an authentication bypass vulnerability in its SNI check, which is
CVE-2026-114637 HIGH 8.7 UPGRADE Traefik from v3.2.0 before v3.7.14 contains an authentication bypass vulnerability in the experimental FastPro
CVE-2026-114638 HIGH 8.7 UPGRADE Traefik v3.7.0 before v3.7.14 contains an improper authentication vulnerability in the Kubernetes Ingress NGIN
CVE-2026-114639 HIGH 8.7 UPGRADE Traefik 2.11.0 before 2.11.58 and 3.0.0 before 3.7.14 contains an authentication bypass because a first reques
CVE-2026-114640 HIGH 8.7 UPGRADE Traefik from v3.7.0 before v3.7.14 contains an authentication bypass vulnerability in its Kubernetes Ingress-N

References

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