Skip to content
Patch Next
Sign inAdd to your agent

← Actionable
High, CVSS 8.8amended

PDF.js vulnerable to arbitrary JavaScript execution upon opening a malicious PDF

CVE-2024-4367GHSA-wgrm-67xf-hhpq

What to do

Vendor fix available. Upgrade each affected package to the fixed version on its release line (pdfjs-dist 4.2.67), redeploy, then verify what is actually installed.

This page has no inventory attached, so it cannot say whether you are affected. A vendor fix is not proof that your deployment is fixed.

Add to your agent

Affected packages

Sources

Severity and exploitation
Exploitation
No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.
CVSS
8.8 · CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
EPSS
  • CVE-2024-4367: 70.66% estimated exploitation activity in the next 30 days; percentile 99.39 (FIRST EPSS, 2026-11-03). This is a model estimate, not proof of exploitation or customer exposure.
Source description

As published by the source; long descriptions are shortened.

Impact 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. Patches The patch removes the use of eval: https://github.com/mozilla/pdf.js/pull/18015 Workarounds Set the option isEvalSupported to false. References https://bugzilla.mozilla.org/showbug.cgi?id=1893645

Dates and revisions
Published by the source
Last modified by the source
Source last checked
  1. Revision 2 · amended ·

    Amended from ghsa record GHSA-wgrm-67xf-hhpq

  2. Revision 1 · created ·

    Published from osv record GHSA-wgrm-67xf-hhpq

Agent brief

Preview the exact text before you copy it. Commands are read-only suggestions; review them before running anything.

# Patch Next advisory brief: CVE-2024-4367

Advisory: PDF.js vulnerable to arbitrary JavaScript execution upon opening a malicious PDF
IDs: CVE-2024-4367, GHSA-wgrm-67xf-hhpq
Record: https://patchnext.com/advisories/cve-2024-4367 (revision 2, source checked 26 Oct 2026, 12:52 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: High (CVSS 8.8)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor fix available; fixed versions by package: pdfjs-dist 4.2.67. A vendor fix does not mean a deployment is fixed.

## Affected components
- npm pdfjs-dist: affected <= 4.1.392; fixed in 4.2.67

## Suggested inspection (read-only)
- `npm ls pdfjs-dist --all`: lists every installed copy and version, including transitive ones. Run in the project root after `npm ci`.

## Supported action
Upgrade each affected component to a fixed version on its release line. For a transitive dependency, upgrade the parent package or add an override or constraint, then regenerate the lockfile. Redeploy every environment that ran an affected version.

## Required regression checks
- Run the test suite and a production build.
- Exercise the features that depend on pdfjs-dist.
- Repeat the inspection and confirm that only fixed versions remain installed.

## Rollback considerations
- Keep the previous lockfile and deployment artifact. Rolling back reinstates the vulnerable version, so apply any documented mitigation while you fix forward.

## Unresolved questions
- Which deployments run an affected version?
- Exploitation status can change. Check again before lowering the priority.
- Mark the work resolved only after the fixed version is verified in production.

## Sources
- Verified: https://osv.dev/vulnerability/GHSA-wgrm-67xf-hhpq (OSV record GHSA-wgrm-67xf-hhpq lists affected ranges: npm pdfjs-dist >=0 <4.2.67 (fixed))
- Verified: https://github.com/advisories/GHSA-wgrm-67xf-hhpq (GitHub-reviewed advisory GHSA-wgrm-67xf-hhpq lists affected ranges: npm pdfjs-dist >=0 <=4.1.392)

Commands are suggestions: review each one before running it.

Loading voting…