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CVE-2026-85595Traefik before v2.11.55 and v3.0.0 through v3.7.10 Authentication Bypass via digestAuth
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.
9.3 CRITICALEPSS 2.45%Not in KEVNVD: Analyzed
Overview
Severity
| Score | Severity | Version | Vector String |
|---|---|---|---|
| 9.3 | CRITICAL | 4.0VulnCheck (CNA) | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N |
| 9.8 | CRITICAL | 3.1NVD | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
Details
- CVE ID
- CVE-2026-85595
- Status
- Analyzed
- Assigner (CNA)
- VulnCheck
- Published
- Sep 4, 2026
- Last modified
- 2026-10-08 16:17 UTC
- Weaknesses
- CWE-287 · Improper Authentication
Affected Products
As published by the CNA in the CVE record.
traefiktraefik1 version range
- before 2.11.55
traefiktraefik1 version range
- 3.0.0 through 3.7.10