CVE-2026-16633

Summary

PDF.js: Arbitrary JavaScript execution upon opening a malicious PDF

Severity

high

CWE

CWE-79

Also known as

GHSA-hq66-cqwq-w95j

Published

2026-08-06

Updated

2026-08-06

Advisory details

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.

References

• https://github.com/advisories/GHSA-hq66-cqwq-w95j
• https://github.com/mozilla/pdf.js/security/advisories/GHSA-hq66-cqwq-w95j
• https://bugzilla.mozilla.org/show_bug.cgi?id=2055885

Related advisories

• GHSA-cg2g-xh64-v4q7 — critical · npm/dompurify
• CVE-2026-102989 — critical · npm/@tanstack/start-server-core
• CVE-2026-104252 — critical · Go/vitess.io/vitess
• CVE-2026-107845 — critical · Packagist/contao/comments-bundle
• CVE-2026-106102 — critical · npm/quasar
• CVE-2026-10032 — critical · npm/@a2ui/web_core
• CVE-2026-59167 — critical · npm/suneditor
• CVE-2026-75828 — critical · Packagist/getgrav/grav

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