CVE-2026-29777

MEDIUM

6.5

Description

Traefik is an HTTP reverse proxy and load balancer. Prior to 3.6.10, A tenant with write access to an HTTPRoute resource can inject backtick-delimited rule tokens into Traefik's router rule language via unsanitized header or query parameter match values. In shared gateway deployments, this can bypass listener hostname constraints and redirect traffic for victim hostnames to attacker-controlled backends. This vulnerability is fixed in 3.6.10.

CVE Details

CVSS v3.1 Score6.5

SeverityMEDIUM

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

Attack VectorNETWORK

ComplexityLOW

Privileges RequiredLOW

User InteractionNONE

Published3/11/2026

Last Modified3/19/2026

Sourcenvd

Honeypot Sightings0

Affected Products

traefik:traefik

Weaknesses (CWE)

CWE-74

References

https://github.com/traefik/traefik/releases/tag/v3.6.10(security-advisories@github.com)

https://github.com/traefik/traefik/security/advisories/GHSA-8q2w-wr49-whqj(security-advisories@github.com)

IOC Correlations

No correlations recorded

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