Improper Input Validation Affecting gitlab-rails-ce-18.11 package, versions <18.11.6-r7


Severity

Recommended
low

Based on default assessment until relevant scores are available.

Threat Intelligence

EPSS
0.37% (30th percentile)

Do your applications use this vulnerable package?

In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.

Test your applications
  • Snyk IDSNYK-CHAINGUARDLATEST-GITLABRAILSCE1811-17896120
  • published9 Jul 2026
  • disclosed22 Jun 2026

Introduced: 22 Jun 2026

CVE-2026-55602  (opens in a new tab)
CWE-20  (opens in a new tab)
CWE-187  (opens in a new tab)

How to fix?

Upgrade Chainguard gitlab-rails-ce-18.11 to version 18.11.6-r7 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream gitlab-rails-ce-18.11 package and not the gitlab-rails-ce-18.11 package as distributed by Chainguard. See How to fix? for Chainguard relevant fixed versions and status.

http-proxy-middleware is node.js http-proxy middleware. From 0.16.0 until 2.0.10, 3.0.6, and 4.1.0, http-proxy-middleware documents router proxy-table entries as host, path, or host+path selectors, but the host+path implementation uses unanchored substring matching on attacker-controlled request metadata. As a result, a crafted Host header that is only a superstring match for a configured host+path key can still route a request to an unintended backend. This vulnerability is fixed in 2.0.10, 3.0.6, and 4.1.0.

CVSS Base Scores

version 3.1