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SCA: security update for Traefik (GHSA-9cr8-q42q-g8m7)

high Tenable Cloud Security Plugin ID 443320

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. Versions prior to 3.7.3, 3.6.18, and 2.11.51 have a
 critical vulnerability in Traefik's HTTP/3 (QUIC) TLS configuration selection that allows unauthenticated
 clients to bypass router-specific mTLS enforcement. When HTTP/3 is enabled on an entrypoint, the TLS
 handshake selects the applicable TLS configuration through an exact, case-sensitive lookup on the SNI
 value, which fails to match wildcard host patterns (e.g., *.example.com) or case variants of the
 configured hostname. Because the handshake falls back to the default TLS configuration — which may not
 require client certificates — a client can complete the QUIC handshake without presenting a certificate,
 while the subsequent HTTP routing layer still dispatches the request to a backend protected by a router-
 specific mTLS policy. The issue affects deployments where HTTP/3 is enabled, a router uses a wildcard Host
 rule or case-insensitive hostname matching, a router-specific TLSOptions enforces client certificate
 authentication, and UDP access to the entrypoint is reachable by an attacker. This vulnerability is fixed
 in versions 3.7.3, 3.6.18, and 2.11.51. (CVE-2026-53622)

Solution

Update the Traefik library and its related packages to version 3.7.3 or later.

See Also

https://github.com/advisories/GHSA-9cr8-q42q-g8m7

Plugin Details

Severity: High

ID: 443320

Version: Revision 1.7

Type: Local

Family: SCA Checks

Published: 6/17/2026

Updated: 9/2/2026

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

Risk Information

VPR

Risk Factor: Medium

Score: 4.8

Percentile: 57.75

Vendor

Vendor Severity: High

CVSS v2

Risk Factor: High

Base Score: 9.4

Temporal Score: 7.4

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

CVSS Score Source: CVE-2026-53622

CVSS v3

Risk Factor: Critical

Base Score: 10

Temporal Score: 9

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

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

CVSS v4

Risk Factor: High

Base Score: 7.8

Threat Score: 7.8

Threat Vector: CVSS:4.0/E:P

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

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 6/16/2026

Vulnerability Publication Date: 6/16/2026

Reference Information

CVE: CVE-2026-53622

cwe: CWE-288