CVE-2026-16633 json
PDF.js: Arbitrary JavaScript execution upon opening a malicious PDF
published 2026-08-06 3 mo ago modified 2026-09-10 1 mo ago also GHSA-hq66-cqwq-w95j
- cvss
- —
- not scored
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- —
- no EPSS score yet
- public exploits
- 0
- none known
Summary
### 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.
Patch / fix
- npm pdfjs-dist 6.2.108
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| npm | pdfjs-dist | >=5.6.83, <6.2.108 |
6.2.108 |
Classification
- Weakness
-
- CWE-79 Improper Neutralization of Input During Web Page Generation
References
Sources
- GitHub Advisory GHSA-hq66-cqwq-w95j
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.