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SCA: security update for github.com/traefik/traefik/v2, github.com/traefik/traefik/v3 (GHSA-6jwx-7vp4-9847)

high Tenable Self-Hosted Container Security Plugin ID 440799

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 high severity authentication bypass vulnerability in Traefik's StripPrefixRegex middleware when
 used in combination with ForwardAuth, BasicAuth, or DigestAuth. The middleware matches the regex against
 the decoded URL path but uses the resulting byte length to slice the percent-encoded raw path. When a dot
 (or multiple dots) appears in the prefix portion of the URL, the raw path after stripping becomes a dot-
 segment (e.g. /./admin/secret). ForwardAuth receives this dot-segment path in X-Forwarded-Uri, which does
 not match the protected path patterns and therefore allows the request through. The backend then
 normalizes the dot-segment to the real path per RFC 3986 and serves the protected content An
 unauthenticated attacker can exploit this against any backend that performs dot-segment normalization.
 This issue has been patched in versions 2.11.43, 3.6.14, and 3.7.0-rc.2. (CVE-2026-40912)

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-6jwx-7vp4-9847

Plugin Details

Severity: High

ID: 440799

Version: Revision 1.8

Type: Local

Family: SCA Checks

Published: 4/24/2026

Updated: 7/2/2026

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

Risk Information

VPR

Risk Factor: Low

Score: 3.5

Percentile: 51.98

Vendor

Vendor Severity: High

CVSS v2

Risk Factor: High

Base Score: 8.5

Temporal Score: 6.7

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

CVSS Score Source: CVE-2026-40912

CVSS v3

Risk Factor: High

Base Score: 8.2

Temporal Score: 7.4

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

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

CVSS v4

Risk Factor: High

Base Score: 7.8

Threat Score: 6.7

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: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-2026-40912

cwe: CWE-706