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High, CVSS 8.8amended

Malicious PDF can inject JavaScript into PDF Viewer

CVE-2018-5158GHSA-7jg2-jgv3-fmr4

What to do

Vendor fix available. Upgrade each affected package to the fixed version on its release line (pdfjs-dist 2.0.550, 1.10.100), 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.

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Affected packages

  • npm pdfjs-dist

    Affected
    >= 2.0.0, < 2.0.550< 1.10.100
    Fixed in
    2.0.550, 1.10.100

Sources

Severity and exploitation
Exploitation
No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.
CVSS
8.8 · CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
EPSS
  • CVE-2018-5158: 10.24% estimated exploitation activity in the next 30 days; percentile 95.69 (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.

The PDF viewer does not sufficiently sanitize PostScript calculator functions, allowing malicious JavaScript to be injected through a crafted PDF file. This JavaScript can then be run with the permissions of the PDF viewer by its worker. This vulnerability affects Firefox ESR < 52.8, Firefox < 60 and PDF.js < 2.0.550.

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

    Amended from ghsa record GHSA-7jg2-jgv3-fmr4

  2. Revision 1 · created ·

    Published from osv record GHSA-7jg2-jgv3-fmr4

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-2018-5158

Advisory: Malicious PDF can inject JavaScript into PDF Viewer
IDs: CVE-2018-5158, GHSA-7jg2-jgv3-fmr4
Record: https://patchnext.com/advisories/cve-2018-5158 (revision 2, source checked 26 Oct 2026, 12:30 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 2.0.550, 1.10.100. A vendor fix does not mean a deployment is fixed.

## Affected components
- npm pdfjs-dist: affected >= 2.0.0, < 2.0.550; < 1.10.100; fixed in 2.0.550, 1.10.100

## 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-7jg2-jgv3-fmr4 (OSV record GHSA-7jg2-jgv3-fmr4 lists affected ranges: npm pdfjs-dist >=2.0.0 =0 <1.10.100 (fixed))
- Verified: https://github.com/advisories/GHSA-7jg2-jgv3-fmr4 (GitHub-reviewed advisory GHSA-7jg2-jgv3-fmr4 lists affected ranges: npm pdfjs-dist >=2.0.0 =0 <1.10.100)

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