GHSA-rh9x-7xjc-vwx2
MEDIUMGHSA-rh9x-7xjc-vwx2 is a medium-severity (CVSS 5.3) vulnerability in nokogiri. O3 Security confirms whether GHSA-rh9x-7xjc-vwx2 is actually reachable in your code before you act, and blocks exploitation at runtime until you patch.
Duplicate Advisory: Nokogiri XSLT transform has a memory leak
Real-World Exposure
nokogiriReal-time download stats are indexed for npm and PyPI packages. This vulnerability affects RubyGems packages — download data is not available via public APIs for these ecosystems.
Description
Duplicate Advisory
This advisory has been withdrawn because it is a duplicate of GHSA-v2fc-qm4h-8hqv. This link is maintained to preserve external references.
Original Description
Nokogiri versions before 1.19.3 contain a memory leak in the XSLT Stylesheet transform method when processing Ruby strings containing null bytes. Attackers can exploit this by passing attacker-controlled input with null bytes to transform parameters, causing heap allocations to leak and enabling denial of service against long-running processes.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 💎RubyGems | nokogiri | all versions | No fix |
Detection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for nokogiri. 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.
Remediation status
No patched version of nokogiri has shipped for GHSA-rh9x-7xjc-vwx2 yet. Where your build allows, override or pin the dependency away from the vulnerable range, and apply any maintainer-recommended mitigation.
Mitigate without a patch
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-rh9x-7xjc-vwx2 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-rh9x-7xjc-vwx2. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.
Frequently Asked Questions
Is GHSA-rh9x-7xjc-vwx2 in your dependencies?
O3 detects GHSA-rh9x-7xjc-vwx2 across RubyGems dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.