mozilla/pdf.js · Security
PDF.js: Arbitrary JavaScript execution upon opening a malicious PDF
- GHSA ID
- GHSA-hq66-cqwq-w95j
- CVE ID
- CVE-2026-16633
- Severity
- high
- Published
- Updated
- CVSS v4
- 8.6 · CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
Description
Impact
If PDF.js is used to load a malicious PDF, and PDF.js is configured with enableScripting set to true (which is the default value) and no CSP for disallowing script-src, unrestricted attacker-controlled JavaScript will be executed in the context of the hosting domain.
Patches
Workarounds
Set enableScripting to false or set a CSP.
CWEs
- CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')