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Traefik 2.x < 2.11.46 / 3.x < 3.6.17 / 3.7.x < 3.7.1 Authentication Bypass (CVE-2026-44774)

medium Nessus Plugin ID 314905

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Synopsis

The remote macOS host is affected by an authentication bypass vulnerability.

Description

The version of Traefik installed on the remote macOS host is 2.x prior to 2.11.46, 3.x prior to 3.6.17, or 3.7.x prior to 3.7.1. It is, therefore, affected by an authentication bypass vulnerability:

 - The Kubernetes Gateway API provider accepts any TraefikService backend reference whose name ends with @internal, allowing exposure of the rest@internal handler and bypassing the providers.rest.insecure=false setting.
 (CVE-2026-44774)

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 2.11.46, 3.6.17, 3.7.1, or later.

See Also

http://www.nessus.org/u?4cb940a2

Plugin Details

Severity: Medium

ID: 314905

File Name: macos_traefik_CVE-2026-44774.nasl

Version: 1.3

Type: Local

Agent: macosx

Published: 5/15/2026

Updated: 5/20/2026

Supported Sensors: Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: High

Score: 7.3

CVSS v2

Risk Factor: High

Base Score: 9

Temporal Score: 7

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

CVSS Score Source: CVE-2026-44774

CVSS v3

Risk Factor: Critical

Base Score: 9.9

Temporal Score: 8.9

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

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

CVSS v4

Risk Factor: Medium

Base Score: 6.4

Threat Score: 5.6

Threat Vector: CVSS:4.0/E:P

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

Vulnerability Information

CPE: cpe:/a:traefik:traefik

Required KB Items: Host/local_checks_enabled, installed_sw/traefik

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 5/11/2026

Vulnerability Publication Date: 5/11/2026

Reference Information

CVE: CVE-2026-44774

IAVB: 2026-B-0127