Unchecked Return Value to NULL Pointer Dereference in PDFDocumentHandler.cpp

Exploitation

No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.

CVSS

7.5 · CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS

• CVE-2022-39381: 0.89% estimated exploitation activity in the next 30 days; percentile 59.55 (FIRST EPSS, 2026-11-03). This is a model estimate, not proof of exploitation or customer exposure.

As published by the source; long descriptions are shortened.

Impact The package muhammara before 2.6.0; all versions of package hummus are vulnerable to Denial of Service (DoS) when supplied with a maliciously crafted PDF file to be appended to another. Patches It has been patched in 2.6.0 for muhammara and not at all for hummus Workarounds Do not process files from untrusted sources References PR: https://github.com/julianhille/MuhammaraJS/pull/194 Issue: https://github.com/julianhille/MuhammaraJS/issues/191 Issue in hummus: https://github.com/galkahana/HummusJS/issues/293 Outline differences to https://nvd.nist.gov/vuln/detail/CVE-2022-25892 The difference is one is in src/deps/PDFWriter/PDFParser.cpp and the other is PDFDocumentHandler.cpp both is a null pointer but for different cases These are totally diffent issues, one is in reading a pdf the other is in appendending a maliciously crafted one. The function calls are different the versions in which they are solved are diffent.

Published by the source

2 Nov 2022, 18:10 UTC

Last modified by the source

8 Nov 2023, 04:10 UTC

Source last checked

26 Oct 2026, 12:21 UTC

1. Revision 2 · amended · 26 Oct 2026

   Amended from ghsa record GHSA-rcrx-fpjp-mfrw

2. Revision 1 · created · 24 Oct 2026

   Published from osv record GHSA-rcrx-fpjp-mfrw

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# Patch Next advisory brief: CVE-2022-39381

Advisory: Unchecked Return Value to NULL Pointer Dereference in PDFDocumentHandler.cpp
IDs: CVE-2022-39381, GHSA-rcrx-fpjp-mfrw
Record: https://patchnext.com/advisories/cve-2022-39381 (revision 2, source checked 26 Oct 2026, 12:21 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: High (CVSS 7.5)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor fix available; fixed versions by package: hummus 1.0.111; muhammara 2.6.0. A vendor fix does not mean a deployment is fixed.

## Affected components
- npm hummus: affected < 1.0.111; fixed in 1.0.111
- npm muhammara: affected < 2.6.0; fixed in 2.6.0

## Suggested inspection (read-only)
- `npm ls hummus --all`: lists every installed copy and version, including transitive ones. Run in the project root after `npm ci`.
- `npm ls muhammara --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 hummus, muhammara.
- 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-rcrx-fpjp-mfrw (OSV record GHSA-rcrx-fpjp-mfrw lists affected ranges: npm muhammara >=0 =0 <1.0.111 (fixed))
- Verified: https://github.com/advisories/GHSA-rcrx-fpjp-mfrw (GitHub-reviewed advisory GHSA-rcrx-fpjp-mfrw lists affected ranges: npm muhammara >=0 =0 <1.0.111)

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