🛡️ CVE-2026-16633 — pdfjs-dist

🟠 CVSS 8.0 — High ✅ No Known Exploit CWE-79 OSV
8.0
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

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

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.

How this vulnerability can be exploited

This issue can be reached over the network, attack complexity is low, an attacker needs no privileges on the target. A user must be tricked into taking some action. Rated impact: confidentiality high, integrity high, availability none.

Weakness class

CVE-2026-16633 is classified as CWE-79: Cross-site Scripting (XSS). User-supplied data is written into a page without escaping, so attacker script runs in the browser of anyone who views it.

Affected software

CVE-2026-16633 is recorded against 1 package.

  • pdfjs-dist

Timeline and source

Published on 6 August 2026 and last revised on 7 August 2026. No public exploit is currently recorded for this entry. Record sourced from OSV.

References

github.com (Web)
bugzilla.mozilla.org (Web)
github.com (Package)

Details

Severity HIGH
CVSS Score 8.0
CVSS Vector 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
CWE CWE-79
Public Exploit ✅ No
Source OSV
Published 2026-08-06
Updated 2026-08-12
Modified 2026-08-07
Fix URL N/A

Affected Packages

Software From version Fixed in
pdfjs-dist — —

Site Security Check

Is pdfjs-dist part of your stack?

CVE-2026-16633 is rated CVSS 8.0 High. BotEraser scans your installation against known CVE records and tells you whether this vulnerability applies to the versions you actually run.

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