CVE-2026-85595Public exploitNetwork attack vectorHinoki check available

Unauthenticated route access via empty digest secret

Published Sep 4, 2026 · Updated Sep 4, 2026

Authentication bypass in Traefik Proxy through 2.11.54 and 3.0.0 through 3.7.10 allows remote attackers to access digestAuth routes. The digestAuth secret provider returns an empty string for an unknown username, and the pinned digest library accepts it as HA1 when calculating the response. Any client that can reach a protected route can compute a matching digest without credentials and obtain the access intended for configured users.

CVSS severity9.3
Critical
EPSS probability0.41%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Authentication bypass in Traefik Proxy through 2.11.54 and 3.0.0 through 3.7.10 allows remote attackers to access digestAuth routes. The digestAuth secret provider returns an empty string for an unknown username, and the pinned digest library accepts it as HA1 when calculating the response. Any client that can reach a protected route can compute a matching digest without credentials and obtain the access intended for configured users.

The record

CVE
CVE-2026-85595
Published
Sep 4, 2026
Updated
Sep 4, 2026
Vendor
Traefik Labs
Product
Traefik Proxy
Classifications
CWE-287, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 4, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 4, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <2.11.55
  2. Affected versionversion=3.0.0 <=3.7.12

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Traefik Labs · Traefik Proxyversion=0 <2.11.55; version=3.0.0 <=3.7.12

Published CVSS scores

9.3GitHub Security AdvisoryCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-287Improper Authentication
T1190Exploit Public-Facing Application

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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