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Traefik < 3.6.10 HTTPRoute Rule Injection

medium Nessus Plugin ID 318669

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Synopsis

The remote macOS host is affected by a vulnerability.

Description

The version of Traefik installed on the remote macOS host is prior to 3.6.10. It is, therefore, affected by a vulnerability:

 - 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-2026-29777)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

Solution

Upgrade to Traefik version 3.6.10 or later.

See Also

http://www.nessus.org/u?7e713128

Plugin Details

Severity: Medium

ID: 318669

File Name: macos_traefik_3_6_10.nasl

Version: 1.2

Type: Local

Agent: macosx

Published: 6/4/2026

Updated: 6/9/2026

Supported Sensors: Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Low

Score: 3.6

CVSS v2

Risk Factor: Medium

Base Score: 6.8

Temporal Score: 5

Vector: CVSS2#AV:N/AC:L/Au:S/C:N/I:C/A:N

CVSS Score Source: CVE-2026-29777

CVSS v3

Risk Factor: Medium

Base Score: 6.5

Temporal Score: 5.7

Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

CVSS v4

Risk Factor: Medium

Base Score: 6.1

Threat Score: 2.1

Threat Vector: CVSS:4.0/E:U

Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:N/SC:H/SI:N/SA:N

Vulnerability Information

CPE: cpe:/a:traefik:traefik

Required KB Items: Host/local_checks_enabled, installed_sw/traefik

Exploit Ease: No known exploits are available

Patch Publication Date: 3/11/2026

Vulnerability Publication Date: 3/11/2026

Reference Information

CVE: CVE-2026-29777

IAVB: 2026-B-0059