CVE-2026-40505
3.3 · LOWOverview
CVE-2026-40505 is a low-severity vulnerability affecting artifex mupdf. It was published on April 16, 2026 and has a CVSS 3.1 base score of 3.3 (LOW).
This vulnerability has a CVSS 3.1 base score of 3.3, rated LOW. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.
Technical Description
MuPDF before 1.27 contains an ANSI injection vulnerability in mutool that allows attackers to inject arbitrary ANSI escape sequences through crafted PDF metadata fields. Attackers can embed malicious ANSI escape codes in PDF metadata that are passed unsanitized to terminal output when running mutool info, enabling them to manipulate terminal display for social engineering attacks such as presenting fake prompts or spoofed commands.
Remediation
Check the references section for vendor advisories and patches from artifex. Update mupdf to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
Affected Products
| Vendor | Product | Versions | Status |
|---|---|---|---|
| artifex | mupdf | >= 0, < 1.27.0 | Affected |
References
Frequently Asked Questions
What is CVE-2026-40505?
CVE-2026-40505 is a low-severity vulnerability affecting artifex mupdf. It was published on April 16, 2026 and has a CVSS 3.1 base score of 3.3 (LOW).
How severe is CVE-2026-40505?
This vulnerability has a CVSS 3.1 base score of 3.3, rated LOW. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.
How do I fix or remediate CVE-2026-40505?
Check the references section for vendor advisories and patches from artifex. Update mupdf to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
How can CyberStrike help with CVE-2026-40505?
CyberStrike's AI-powered security agents can automatically detect CVE-2026-40505 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
How CyberStrike Helps
AI agents map your attack surface to find vulnerabilities like this one.
Automated penetration testing that runs continuously, not just quarterly.
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Browser-based exploitation validates findings with real proof-of-concept.
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