How severe is GHSA-pfcc-3g6r-8rg8?

GHSA-pfcc-3g6r-8rg8 has a CVSS score of 9.8/10, rated CRITICAL. Immediate patching is strongly recommended.

Which packages are affected by GHSA-pfcc-3g6r-8rg8?

GHSA-pfcc-3g6r-8rg8 affects the following packages: io.undertow:undertow-core (Maven), io.undertow:undertow-core (Maven). Ecosystems affected: Maven.

How do I fix GHSA-pfcc-3g6r-8rg8?

Update io.undertow:undertow-core to 2.3.5.Final or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-pfcc-3g6r-8rg8 is resolved across your whole dependency graph.

How do I detect GHSA-pfcc-3g6r-8rg8 in my Maven dependencies?

Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for io.undertow:undertow-core. O3's reachability analysis confirms whether the vulnerable code path is actually invoked in your application, so you act on real exposure instead of every transitive match.

How do I mitigate GHSA-pfcc-3g6r-8rg8 if there is no patch (or I can't update yet)?

If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.

How does O3 Security protect against GHSA-pfcc-3g6r-8rg8?

O3 pinpoints whether GHSA-pfcc-3g6r-8rg8 is reachable in your code and exactly where to fix it, then blocks exploitation in production at runtime until the patched version is deployed.

Is GHSA-pfcc-3g6r-8rg8 actively exploited in the wild?

No public exploit code has been indexed for GHSA-pfcc-3g6r-8rg8 yet. This does not mean the vulnerability cannot be exploited — absence of public exploits does not imply safety. Apply the recommended fix and use O3 Security to monitor your exposure.

What is the EPSS score for GHSA-pfcc-3g6r-8rg8?

GHSA-pfcc-3g6r-8rg8 has an EPSS (Exploit Prediction Scoring System) score of 0.6%, placing it in the 44th percentile of all CVEs. EPSS is maintained by FIRST.org and estimates the probability that a vulnerability will be exploited in the wild within the next 30 days. This score indicates relatively lower exploitation probability, though the CVSS severity should still guide your patching priority.

What type of vulnerability is GHSA-pfcc-3g6r-8rg8?

GHSA-pfcc-3g6r-8rg8 is classified as Server-Side Request Forgery (SSRF) (CWE-918). This weakness type describe the underlying flaw category, which helps determine the potential impact and the right class of mitigation. This is a high-impact weakness class that often enables remote code execution or data exposure.

When was GHSA-pfcc-3g6r-8rg8 published, and has it been updated?

GHSA-pfcc-3g6r-8rg8 was published on February 23, 2023 and was last updated on March 12, 2025. Advisory data evolves as severity scores, affected ranges, and exploit intelligence are revised — always check the latest version of the advisory before acting.

☕ Maven

GHSA-pfcc-3g6r-8rg8

CRITICAL

Undertow client not checking server identity presented by server certificate in https connections

Also known asCVE-2022-4492

Published

Feb 23, 2023

Updated

Mar 12, 2025

Affected

2 pkgs

Patched

2 / 2

Exploits

None indexed

EPSS Exploitation Probability

via FIRST.org ↗

0.6%probability of exploitation in next 30 days

Lower Risk44th percentile+0.44%

EPSS (Exploit Prediction Scoring System) is a daily probability model maintained by FIRST.org. It estimates the likelihood a CVE will be exploited in production environments within the next 30 days, derived from real-world threat intelligence signals.

Blast Radius

2 pkgs affected

☕io.undertow:undertow-core☕io.undertow:undertow-core

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects Maven packages — download data is not available via public APIs for these ecosystems.

Description

The undertow client is not checking the server identity presented by the server certificate in https connections. This should be performed by default in https and in http/2.

Affected Packages

2 total 2 fixed

Ecosystem	Package	Vulnerable range	Fix
☕Maven	`io.undertow:undertow-core`	≥ 2.3.0&&< 2.3.5.Final	2.3.5.Final
☕Maven	`io.undertow:undertow-core`	all versions	2.2.24.Final

Detection & mitigation playbook

Open-source dependency

Detect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for io.undertow:undertow-core. O3's reachability analysis confirms whether the vulnerable code path is actually invoked in your application, so you act on real exposure instead of every transitive match.
Fix
Update io.undertow:undertow-core to 2.3.5.Final or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-pfcc-3g6r-8rg8 is resolved across your whole dependency graph.
Workarounds
If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.
How O3 protects you
O3 pinpoints whether GHSA-pfcc-3g6r-8rg8 is reachable in your code and exactly where to fix it, then blocks exploitation in production at runtime until the patched version is deployed.

Tailored to GHSA-pfcc-3g6r-8rg8. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.

Frequently Asked Questions

The undertow client is not checking the server identity presented by the server certificate in https connections. This should be performed by default in https and in http/2.

O3 Security · Impact-Aware SCA

Is GHSA-pfcc-3g6r-8rg8 in your dependencies?

O3 detects GHSA-pfcc-3g6r-8rg8 across Maven dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.

Scan my dependencies How O3 SCA works