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© 2026 FAUCET Technologies LLC. All rights reserved.

CVE-2026-35051

41
FAUCET Score

Traefik is an HTTP reverse proxy and load balancer. Prior to versions 2.11.43, 3.6.14, and 3.7.0-rc.2, there is an authentication bypass vulnerability in Traefik's ForwardAuth middleware when trustForwardHeader=false is configured and Traefik is deployed behind a trusted upstream proxy. This issue has been patched in versions 2.11.43, 3.6.14, and 3.7.0-rc.2.

First published: Apr 30, 2026Last modified: May 1, 2026

Impacted Technologies

VendorProductVersion(s)CPE
< 2.11.43CPE matchmatch criteria
cpe:2.3:a:traefik:traefik:*:*:*:*:*:*:*:*
>= 3.0.0, < 3.6.14CPE matchmatch criteria
cpe:2.3:a:traefik:traefik:*:*:*:*:*:*:*:*
3.7.0CPE matchmatch criteria
cpe:2.3:a:traefik:traefik:3.7.0:ea1:*:*:*:*:*:*
3.7.0CPE matchmatch criteria
cpe:2.3:a:traefik:traefik:3.7.0:ea2:*:*:*:*:*:*
3.7.0CPE matchmatch criteria
cpe:2.3:a:traefik:traefik:3.7.0:ea3:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 4.0

7.8HIGH

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:H/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
NONE
VS Confidentiality
NONE
VS Integrity
NONE
VS Availability
NONE
SS Confidentiality
HIGH
SS Integrity
LOW
SS Availability
NONE
Exploit Maturity
NOT_DEFINED
CvssVersion
4.0

Exploit Intelligence

EPSS Score
0.27%
Probability of exploitation in next 30 days
EPSS Percentile
18.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0027 is in the 1st percentile among its peer group of 36,897 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (4)

github_advisorypatch availablevia nvd_reference
View patch
gopatch availablevia ghsa
Product: github.com/traefik/traefik/v3Fixed in: 3.7.0-rc.2
gopatch availablevia ghsa
Product: github.com/traefik/traefik/v3Fixed in: 3.6.14
gopatch availablevia ghsa
Product: github.com/traefik/traefik/v2Fixed in: 2.11.43

Vendor Advisories (1)

goGHSA-6384-m2mw-rf54high

Traefik's ForwardAuth trustForwardHeader=false allows spoofed X-Forwarded-Prefix to bypass authentication

Apr 24, 2026

References

access.redhat.com / errata/RHSA-2026:21772
access.redhat.com / security/cve/CVE-2026-35051
bugzilla.redhat.com / show_bug.cgi
security.access.redhat.com / data/csaf/v2/vex/2026/cve-2026-35051.json
github.com / traefik/traefik/releases/tag/v2.11.43
ProductRelease Notes
github.com / traefik/traefik/releases/tag/v3.6.14
ProductRelease Notes
github.com / traefik/traefik/releases/tag/v3.7.0-rc.2
ProductRelease Notes
github.com / traefik/traefik/security/advisories/GHSA-6384-m2mw-rf54
ExploitPatchVendor Advisory