GHSA-x9p2-fxq6-2m5f is a medium-severity (CVSS 4.3) vulnerability in swagger-ui. A fix is available for swagger-ui — see the affected versions and patch details below.
Real-World Exposure
How broadly this vulnerability is actually deployed: weekly install volume shows current usage, and reverse-dependency count shows how many other packages break if it stays unpatched.
swagger-uinpmDescription
Versions of swagger-ui prior to 3.18.0 are vulnerable to Reverse Tabnapping. The package uses target='_blank' in anchor tags, allowing attackers to access window.opener for the original page. This is commonly used for phishing attacks.
Recommendation
Upgrade to version 3.18.0 or later.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 📦npm | swagger-ui | all versions | 3.18.0npm install swagger-ui@3.18.0 |
Detection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for swagger-ui, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update swagger-ui to 3.18.0 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-x9p2-fxq6-2m5f 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.
Frequently Asked Questions
Is GHSA-x9p2-fxq6-2m5f in your dependencies?
Find it across npm, including transitive dependencies.