Server-Side Request Forgery (SSRF) Affecting gitlab-rails-ce-fips-18.11 package, versions <18.11.6-r0


Severity

Recommended
low

Based on default assessment until relevant scores are available.

Threat Intelligence

EPSS
0.27% (19th percentile)

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  • Snyk IDSNYK-CHAINGUARDLATEST-GITLABRAILSCEFIPS1811-17445423
  • published24 Jun 2026
  • disclosed6 Apr 2026

Introduced: 6 Apr 2026

CVE-2026-33540  (opens in a new tab)
CWE-918  (opens in a new tab)

How to fix?

Upgrade Chainguard gitlab-rails-ce-fips-18.11 to version 18.11.6-r0 or higher.

NVD Description

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

Distribution is a toolkit to pack, ship, store, and deliver container content. Prior to 3.1.0, in pull-through cache mode, distribution discovers token auth endpoints by parsing WWW-Authenticate challenges returned by the configured upstream registry. The realm URL from a bearer challenge is used without validating that it matches the upstream registry host. As a result, an attacker-controlled upstream (or an attacker with MitM position to the upstream) can cause distribution to send the configured upstream credentials via basic auth to an attacker-controlled realm URL. This vulnerability is fixed in 3.1.0.

CVSS Base Scores

version 3.1