Traefik 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.
CVE-2026-85595
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-85595
traefik
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
traefik
Source reference: /containers/cna/affected/1/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"vendor": "traefik",
"product": "traefik",
"versions": [
{
"status": "affected",
"version": "0",
"lessThan": "2.11.55",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "2.11.55",
"versionType": "semver"
}
],
"packageURL": "pkg:golang/github.com/traefik/traefik/v2",
"defaultStatus": "unaffected"
},
{
"vendor": "traefik",
"product": "traefik",
"versions": [
{
"status": "affected",
"version": "3.0.0",
"versionType": "semver",
"lessThanOrEqual": "3.7.10"
}
],
"packageURL": "pkg:golang/github.com/traefik/traefik/v3",
"defaultStatus": "unaffected"
}
]- Related CVEs
- CVE-2026-85595
Source reference:
/cveMetadata/cveId
Publisher severity
critical
Source reference: /containers/cna/metrics
- Event
- #13006 · Revision 1
- Added to Heist Feed
- Publisher date