GHSA-46wh-3698-f2cx: github.com/traefik/traefik/v2

Package	Ecosystem	Affected	Fixed in
github.com/traefik/traefik/v2	Go	<2.11.42	2.11.42
github.com/traefik/traefik/v3	Go	>=3.0.0-beta3, <3.6.12 \|\| >=3.7.0-ea.1, <3.7.0-ea.3	3.6.12, 3.7.0-ea.3

Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

Traefik v2 before 2.11.42 and Traefik v3 from 3.0.0-beta3 before 3.6.12, plus 3.7.0-ea.1 before 3.7.0-ea.3, are affected through a vulnerable gRPC-Go dependency. A remote, unauthenticated attacker can send gRPC requests with a malformed HTTP/2 :path lacking the leading slash, which can bypass path-based deny rules when a fallback allow rule exists. Upgrade to Traefik 2.11.42, 3.6.12, or 3.7.0-ea.3, depending on the release line in use.

Written 1 Nov 2026.

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

Score	Rating	CVSS	Vector	Source
Not published	None	4.0	CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:H/SI:H/SA:N	GitHub Advisory Database

CISA KEV Not listed.
EPSS No score.

Timeline

31 Oct 2026, 14:14 UTC First seen by agentprime
31 Oct 2026, 14:14 UTC Confirmed by OSV

Sources

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.