Traefik 3.7.0 < 3.7.8 Path Traversal Authentication Bypass (CVE-2026-67309)

high Nessus Plugin ID 335169

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Synopsis

The remote macOS host is affected by a path traversal vulnerability.

Description

The version of Traefik installed on the remote macOS host is 3.7.x prior to 3.7.8. It is, therefore, affected by a path traversal vulnerability:

- A path traversal vulnerability in the Kubernetes Ingress NGINX provider's RewriteTarget middleware allows an unauthenticated attacker to craft requests that bypass route-level authentication (BasicAuth, DigestAuth, or ForwardAuth) by exploiting dot-segment traversal in rewritten paths. (CVE-2026-67309)

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 3.7.8 or later.

Plugin Details

Severity: High

ID: 335169

File Name: macos_traefik_CVE-2026-67309.nasl

Version: 1.2

Type: Local

Agent: macosx

Family: MacOS X Local Security Checks

Published: 8/13/2026

Updated: 8/14/2026

Supported Sensors: Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 4.9

Percentile: 58.15

CVSS v2

Risk Factor: Medium

Base Score: 6.4

Temporal Score: 4.7

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

CVSS Score Source: CVE-2026-67309

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.5

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

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

CVSS v4

Risk Factor: High

Base Score: 7.8

Threat Score: 4.7

Threat Vector: CVSS:4.0/E:U

Vector: 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

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: 7/16/2026

Vulnerability Publication Date: 7/16/2026

Reference Information

CVE: CVE-2026-67309

CWE: 22

IAVA: 2026-A-0821

Detections

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