CVE-2026-35051

critical

Published 2026-04-30 · Modified 2026-05-06

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CVSS v3

10.0

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N

CVSS v4 NEW

7.8

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

VIR risk

10.0

Description

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

Predictions

Exploit likelihood

98%

Patch ETA

—

Heuristic predictions, AS-IS, for prioritization only.

Mitigations

No mitigations published for this CVE yet.

The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.

✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here with source_tier=community-verified.

Package impact

Ecosystem	Package	Vulnerable	Fixed
Go	github.com/traefik/traefik/v3	`>=3.7.0-ea.1,<3.7.0-rc.2`	`3.7.0-rc.2`
Go	github.com/traefik/traefik/v3	`>=3.0.0-beta1,<3.6.14`	`3.6.14`
Go	github.com/traefik/traefik/v2	`<2.11.43`	`2.11.43`
Go	github.com/traefik/traefik	`<=1.7.34`
GO	github.com/traefik/traefik	`<= 1.7.34`
GO	github.com/traefik/traefik/v2	`< 2.11.43`	`2.11.43`
GO	github.com/traefik/traefik/v3	`>= 3.0.0-beta1, < 3.6.14`	`3.6.14`
GO	github.com/traefik/traefik/v3	`>= 3.7.0-ea.1, < 3.7.0-rc.2`	`3.7.0-rc.2`

Application impact

Vendor	Product	Versions	Fixed
traefik	traefik	`{"endExcluding":"2.11.43"}`	`2.11.43`
traefik	traefik	`3.7.0`

References

CWEs

CWE-345

Community-verified mitigations for this CVE will appear above when contributors publish them.

Verify integrity in audit chain (admin only). AS-IS.