Reliance on Untrusted Inputs in a Security Decision Affecting commercial-gitlab-rails-ee-19.4 package, versions <19.4.1-r1


Severity

Recommended
low

Based on default assessment until relevant scores are available.

Threat Intelligence

EPSS
0.3% (22nd percentile)

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  • Snyk IDSNYK-CHAINGUARDLATEST-COMMERCIALGITLABRAILSEE194-20650687
  • published8 Oct 2026
  • disclosed1 Oct 2026

Introduced: 1 Oct 2026

NewCVE-2026-103923  (opens in a new tab)
CWE-807  (opens in a new tab)

How to fix?

Upgrade Chainguard commercial-gitlab-rails-ee-19.4 to version 19.4.1-r1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream commercial-gitlab-rails-ee-19.4 package and not the commercial-gitlab-rails-ee-19.4 package as distributed by Chainguard. See How to fix? for Chainguard relevant fixed versions and status.

KaTeX is a fast, easy-to-use JavaScript library for TeX math rendering on the web. From 0.11.0 until 0.18.2, KaTeX uses ordinary JavaScript property access for the renderer options object, the trust setting, default and processor setting metadata, and namespace lookup and group restoration, allowing inherited properties to be treated as explicitly supplied values. When Object.prototype is already polluted or an attacker controls the options object's prototype, attacker-controlled mathematical expressions can use an inherited trust value to enable trusted rendering and produce links capable of user-interaction cross-site scripting or loading attacker-selected external resources in a consuming application that inserts unsanitized KaTeX output into a page. KaTeX does not itself create the prototype pollution, and rendering an expression alone does not execute script. This issue is fixed in version 0.18.2.

CVSS Base Scores

version 3.1