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CVE-2024-34342: react-pdf's PDF.js vulnerable to arbitrary JavaScript execution upon opening a malicious PDF

• Severity: high (CVSS 7.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2024-05-07 · updated 2026-06-17
• Weakness: CWE-79

Description

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 products

• PDF.js Viewer: before 7.7.3, >= 8.0.0, < 8.0.2

References

• https://github.com/mozilla/pdf.js/commit/85e64b5c16c9aaef738f421733c12911a441cec6
• https://github.com/mozilla/pdf.js/pull/18015
• https://github.com/mozilla/pdf.js/security/advisories/GHSA-wgrm-67xf-hhpq
• https://github.com/wojtekmaj/react-pdf/commit/208f28dd47fe38c33ce4bac4205b2b0a0bb207fe
• https://github.com/wojtekmaj/react-pdf/commit/671e6eaa2e373e404040c13cc6b668fe39839cad
• https://github.com/wojtekmaj/react-pdf/security/advisories/GHSA-87hq-q4gp-9wr4
• https://github.com/mozilla/pdf.js/commit/85e64b5c16c9aaef738f421733c12911a441cec6
• https://github.com/mozilla/pdf.js/pull/18015
• https://github.com/mozilla/pdf.js/security/advisories/GHSA-wgrm-67xf-hhpq
• https://github.com/wojtekmaj/react-pdf/commit/208f28dd47fe38c33ce4bac4205b2b0a0bb207fe
• https://github.com/wojtekmaj/react-pdf/commit/671e6eaa2e373e404040c13cc6b668fe39839cad
• https://github.com/wojtekmaj/react-pdf/security/advisories/GHSA-87hq-q4gp-9wr4

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