Null Pointer Dereference in Artifex MuPDF Affects PDF Xref Loading
CVE-2026-92413

5.3MEDIUM

Key Information:

Vendor

Artifex
Status
MuPDF
Vendor
CVE Published:
16 September 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-92413?

A vulnerability has been identified in Artifex MuPDF affecting the PDF Xref Loading functionality. The flaw occurs in the 'pdf_open_filter' function within the 'pdf-stream.c' component. An attacker can exploit this vulnerability by executing a crafted manipulation, potentially leading to a null pointer dereference. This attack can be executed remotely and poses a risk to systems running the affected versions of the software. A patch has been released to address this issue, and it is strongly recommended that users apply it promptly to mitigate any potential exploitation risks.

Affected Version(s)

MuPDF b6d17493700c621c0e70036980a6ebd06d2202c9

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-92413 - Proof of Concept

References

https://vuldb.com/vuln/405593
vdb-entrytechnical-description
https://vuldb.com/vuln/405593/cti
signaturepermissions-required
https://vuldb.com/cve/CVE-2026-92413
third-party-advisory

CVSS V4

Score:
5.3
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
Unknown

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

fczhang (VulDB User)
.