Traefik < 2.11.38 / 3.x < 3.6.9 Multiple Vulnerabilities

high Nessus Plugin ID 318671

Synopsis

The remote macOS host is affected by multiple vulnerabilities.

Description

The version of Traefik installed on the remote macOS host is prior to 2.11.38 or 3.x prior to 3.6.9. It is, therefore, affected by multiple vulnerabilities:

- A flaw exists in the ForwardAuth middleware due to the response body from the authentication server being read entirely into memory without any size limit. An authenticated, remote attacker can exploit this to cause a denial of service via an out-of-memory condition. (CVE-2026-26998)

- A flaw exists in TLS handshake handling on TCP routers due to the read deadline being cleared before the TLS handshake is completed. An unauthenticated, remote attacker can exploit this, via incomplete TLS records, to cause a denial of service by exhausting file descriptors and goroutines. (CVE-2026-26999)

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

Solution

Upgrade to Traefik version 2.11.38, 3.6.9, or later.

Plugin Details

Severity: High

ID: 318671

File Name: macos_traefik_3_6_9.nasl

Version: 1.1

Type: Local

Agent: macosx

Family: MacOS X Local Security Checks

Published: 6/4/2026

Updated: 6/4/2026

Supported Sensors: Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Low

Score: 3.6

CVSS v2

Risk Factor: High

Base Score: 7.8

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

CVSS Score Source: CVE-2026-26999

CVSS v3

Risk Factor: High

Base Score: 7.5

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

Vulnerability Information

CPE: cpe:/a:traefik:traefik

Required KB Items: Host/local_checks_enabled, installed_sw/traefik

Patch Publication Date: 3/5/2026

Vulnerability Publication Date: 3/5/2026

Reference Information

CVE: CVE-2026-26998, CVE-2026-26999

IAVB: 2026-B-0059

Detections

Analytics