Go to homepageCyberStrike

Menu

Star on GitHub · 3.5k
Sign inDownload

CVE-2026-85595

9.8 · CRITICAL

Traefik versions before v2.11.55 and versions v3.0.0 through v3.7.10 contain an authentication bypass vulnerability in the digestAuth middleware where unknown usernames receive an empty secret inst…

Published Sep 4, 2026traefikCWE-287EPSS 2.45%

Overview

CVE-2026-85595 is a critical-severity vulnerability affecting traefik traefik. It was published on September 4, 2026 and has a CVSS 3.1 base score of 9.8 (CRITICAL).

This vulnerability has a CVSS 3.1 base score of 9.8, rated CRITICAL. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

Traefik versions before v2.11.55 and versions v3.0.0 through v3.7.10 contain an authentication bypass vulnerability in the digestAuth middleware where unknown usernames receive an empty secret instead of rejection. Attackers can compute a valid digest response using the empty secret and arbitrary credentials to bypass authentication on any digestAuth-protected route without a valid username or password.

Remediation

Check the references section for vendor advisories and patches from traefik. Update traefik to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

Affected products

VendorProductVersionsStatus
traefiktraefik>= 0, < 2.11.55Affected

References

GitHubgithub.com/traefik/traefik/security/advisories/GHSA-5w68-77r2-r64cRefwww.vulncheck.com/advisories/traefik-before-2.11.55-authentication-bypass-via-digestauth

How CyberStrike helps

Frequently asked questions

What is CVE-2026-85595?

CVE-2026-85595 is a critical-severity vulnerability affecting traefik traefik. It was published on September 4, 2026 and has a CVSS 3.1 base score of 9.8 (CRITICAL).

How severe is CVE-2026-85595?

This vulnerability has a CVSS 3.1 base score of 9.8, rated CRITICAL. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2026-85595?

Check the references section for vendor advisories and patches from traefik. Update traefik to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-85595?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-85595 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

Related CRITICAL CVEs from 2026

View all
Browse by year2026202520242023202220212020201920182017201620152014201320122011201020092008200720062005200420032002200120001999
CyberStrike v2 is here — more intelligence, greater reach