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SCA: security update for github.com/traefik/traefik/v2, github.com/traefik/traefik/v3 (GHSA-xhjw-95fp-8vgq)

medium Tenable Self-Hosted Container Security Plugin ID 441338

Description

There are packages installed that are affected by a vulnerability referenced in the following CVE:

 - Traefik is an HTTP reverse proxy and load balancer. Prior to versions 2.11.43, 3.6.14, and 3.7.0-rc.2,
 there is a potential vulnerability in Traefik's Kubernetes CRD provider cross-namespace isolation
 enforcement. When providers.kubernetesCRD.allowCrossNamespace=false, Traefik correctly rejects direct
 cross-namespace middleware references from IngressRoute objects, but fails to apply the same restriction
 to middleware references nested inside a Chain middleware's spec.chain.middlewares[]. An actor with
 permission to create or update Traefik CRDs in their own namespace can exploit this to cause Traefik to
 resolve and apply middleware objects from another namespace, bypassing the documented isolation boundary.
 This issue has been patched in versions 2.11.43, 3.6.14, and 3.7.0-rc.2. (CVE-2026-41174)

Solution

Update the github.com/traefik/traefik/v2 library and its related packages to version 2.11.43 or later.

See Also

https://github.com/advisories/GHSA-xhjw-95fp-8vgq

Plugin Details

Severity: Medium

ID: 441338

Version: Revision 1.4

Type: Local

Family: SCA Checks

Published: 5/7/2026

Updated: 7/6/2026

Supported Sensors: Tenable Cloud Security, Tenable Self-Hosted Container Security

Risk Information

VPR

Risk Factor: Low

Score: 2.3

Percentile: 9.42

Vendor

Vendor Severity: Medium

CVSS v2

Risk Factor: Medium

Base Score: 5.5

Temporal Score: 4.3

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

CVSS Score Source: CVE-2026-41174

CVSS v3

Risk Factor: Medium

Base Score: 6.4

Temporal Score: 5.8

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

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

CVSS v4

Risk Factor: Medium

Base Score: 4.8

Threat Score: 1.9

Threat Vector: CVSS:4.0/E:P

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

Vulnerability Information

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 4/24/2026

Vulnerability Publication Date: 4/24/2026

Reference Information

CVE: CVE-2026-41174