Secuno
ENNL
Book demo

CVE-2026-67309

7.5 HIGHPublic exploitEPSS 0.49%
  1. Published1 Aug 2026

Description

Traefik versions >= v3.7.0 and <= v3.7.7 contain a path traversal vulnerability in the Kubernetes Ingress NGINX provider's RewriteTarget middleware (generated from the nginx.ingress.kubernetes.io/rewrite-target annotation). When an Ingress path uses a regex that captures attacker-controlled text without requiring a path separator (e.g., path /api(.*) with rewrite target /$1), a crafted request such as /api../admin matches the public router, is rewritten to a dot-segment traversal path (/../admin), and is forwarded without post-replacement normalization validation. A backend that normalizes dot segments resolves the path to a protected endpoint (e.g., /admin) reachable only through a separate router secured with BasicAuth, DigestAuth, or ForwardAuth, resulting in route-level authentication bypass. The issue is fixed in v3.7.8.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityNone
AvailabilityNone
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Affected products

Traefik Traefik≥ 3.7.0 < 3.7.8

Remediation

Fixed in
Traefik Traefik≥ 3.7.8

References

Related CVEs

Recent high-severity vulnerabilities sharing a weakness type.

CVE-2026-927488.8
BC Security Empire before 6.7.1 fails to validate the multipart filename parameter in…
CVE-2026-764098.8
As part of Cisco's ongoing commitment to proactive security and product quality, the…
CVE-2026-926048.1
Scirius through 3.8.0 contains an arbitrary file write vulnerability in the PCAP…
CVE-2026-857318.8
oras-go is a Go library for managing OCI artifacts. Prior to 2.6.2, content/file.Store…
CVE-2026-921378.8
Jenkins Robot Framework Plugin 6.2.2 and earlier does not check that the archive…
CVE-2026-833578.1
Vulnerability in the Oracle GraalVM for JDK, Oracle GraalVM product of Oracle Java SE…

Frequently asked

Is CVE-2026-67309 being actively exploited?

CVE-2026-67309 is not in the CISA KEV catalog. A public exploit reference exists, so treat it as exploitable. Its EPSS exploit probability is 0.49%.

How severe is CVE-2026-67309?

CVE-2026-67309 has a CVSS 3.1 base score of 7.5, rated high. EPSS estimates a 0.49% probability of exploitation.

Which products are affected by CVE-2026-67309?

Affected products include Traefik Traefik.

How do I fix CVE-2026-67309?

Upgrade affected software to a fixed version, for example Traefik Traefik 3.7.8 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2026-67309 against the real software inventory on every managed device, every day. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

See how prioritisation worksBook a demo

Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.