GHSA-R3HF-Q8Q7-FV2P

Angular critical CSS inlining Cross-site Scripting Vulnerability Advisory

Workarounds

The easiest solution is likely to upgrade Universal to 16.1.2 or downgrade to 16.0.x or lower. Alternatively you can override specifically the critters dependency with version 0.0.20 in your package.json.

{
  "overrides": {
    "critters": "0.0.20"
  }
}

References

• Angular Blog Post

Angular Universal applications on 16.1.0 and 16.1.1 using critical CSS inlining are vulnerable to a cross-site scripting (XSS) attack where an attacker can trick another user into visiting a page which injects malicious JavaScript.

Angular CLI applications without Universal do perform critical CSS inlining as well, however exploiting this requires a malicious actor to already have access to modify source code directly.

Untrusted input is rendered as active markup in a victim's browser, which can run script in their session. Typical impact: session or credential theft, and actions taken as the user.

Kodem intelligence

Already deployed Kodem?

@nguniversal/common should be upgraded to 16.1.2 or higher. 16.2.0-rc.0 is safe.

1. What is GHSA-R3HF-Q8Q7-FV2P? GHSA-R3HF-Q8Q7-FV2P is a high-severity cross-site scripting (XSS) vulnerability in @nguniversal/common (npm), affecting versions >= 16.1.0, < 16.1.2. It is fixed in 16.1.2. Untrusted input is rendered as active markup in a victim's browser, which can run script in their session.
2. Which versions of @nguniversal/common are affected by GHSA-R3HF-Q8Q7-FV2P? @nguniversal/common (npm) versions >= 16.1.0, < 16.1.2 is affected.
3. Is there a fix for GHSA-R3HF-Q8Q7-FV2P? Yes. GHSA-R3HF-Q8Q7-FV2P is fixed in 16.1.2. Upgrade to this version or later.
4. Is GHSA-R3HF-Q8Q7-FV2P exploitable, and should I be worried? Whether GHSA-R3HF-Q8Q7-FV2P is exploitable in your environment depends on whether the vulnerable code is present and reachable. A CVSS score is a worst-case rating; it does not account for your specific deployment, configuration, or usage patterns. Kodem, an Intelligent Application Security platform, uses runtime intelligence to show which vulnerabilities actually execute in production, so you can focus on the ones that represent real risk. Get a demo
5. What actually determines whether GHSA-R3HF-Q8Q7-FV2P is exploitable, and how bad it is? Exploitability and impact are not fixed properties of a CVE. They depend on runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A high CVSS score on a dependency that never runs is not the same as real risk. Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter.
6. How do I fix GHSA-R3HF-Q8Q7-FV2P? Upgrade @nguniversal/common to 16.1.2 or later.

Other vulnerabilities in @nguniversal/common