Reference page — cumulative record through Sunday, October 4, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.

CVE-2026-85595

CVE-2026-85595CRITICAL

Traefik before v2.11.55 and v3.0.0 through v3.7.10 Authentication Bypass via digestAuth

  AV  AC  AT  PR  UI  VC  VI  VA   CVSS    EPSS   %ile   KEV
   N   L   N   N   N   H   H   H    9.3   .0069   51.2     —

AFFECTED
  Product  Versions     Fixed
  traefik  unspecified  2.11.55
  traefik  3.0.0 –      —

TIMELINE
  Sep 4   Reserved by VulnCheck
  Sep 4   Published (CNA: VulnCheck)
  Sep 16  EXPLOIT PUBLISHED — CVE-2026-85595 (traefik). Public exploit reference added.

CWE-287 · CNA: VulnCheck · CVSS v4.0 · 2 references · NVD status: Analyzed

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.

Lifecycle

Complete event history — 3 events, chronological
Date	Event	Detail
September 4, 2026	Reserved	Reserved by VulnCheck
September 4, 2026	Published	Published (CNA: VulnCheck)
September 16, 2026	EXPLOIT PUBLISHED	EXPLOIT PUBLISHED — CVE-2026-85595 (traefik). Public exploit reference added.

Affected

Affected products and packages — 2 rows
Vendor	Product / Package	Ecosystem	Version introduced	Fixed
traefik	traefik	—	—	2.11.55
traefik	traefik	—	3.0.0	—

Weaknesses

CWE-287

References (2)

https://github.com/traefik/traefik/security/advisories/GHSA-5w68-77r2-r64c [Patch, Vendor Advisory, Exploit, Mitigation]
https://www.vulncheck.com/advisories/traefik-before-2.11.55-authentication-bypass-via-digestauth [Third Party Advisory]

Authoritative record: CVE-2026-85595 at cve.org

Vendors: traefik

Weaknesses: CWE-287

About this page

This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-85595 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Sunday, October 4, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.