CVE-2024-34342
HIGHCVE-2024-34342 is a high-severity (CVSS 7.1) Cross-site Scripting (XSS) vulnerability in react-pdf. O3 Security confirms whether CVE-2024-34342 is actually reachable in your code before you act, and blocks exploitation at runtime until you patch.
react-pdf's PDF.js vulnerable to arbitrary JavaScript execution upon opening a malicious PDF
Blast Radius
Weekly download volume for affected packages — a proxy for how broadly this vulnerability is deployed.
react-pdfnpmDescription
react-pdf displays PDFs in React apps. If PDF.js is used to load a malicious PDF, and PDF.js is configured with isEvalSupported set to true (which is the default value), unrestricted attacker-controlled JavaScript will be executed in the context of the hosting domain. This vulnerability is fixed in 7.7.3 and 8.0.2.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 📦npm | react-pdf | all versions | 7.7.3 |
| 📦npm | react-pdf | ≥ 8.0.0&&< 8.0.2 | 8.0.2 |
Detection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for react-pdf. 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 react-pdf to 7.7.3 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2024-34342 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 CVE-2024-34342 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 CVE-2024-34342. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.
Frequently Asked Questions
Is CVE-2024-34342 in your dependencies?
O3 detects CVE-2024-34342 across npm dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.