TI-2026-02856 Aliases CVE-2026-3308 GHSA-6jrq-hjxp-2x5r

Integer overflow in Artifex Software Inc. PyMuPDF MuPDF

LOW 35CWE-190Published 2026-03-31 · Updated 2026-04-21

Key facts

Attack vector: Local
Privileges required: None
User interaction: Required
Attack complexity: Low
Impact type: Code execution
Confidentiality · integrity · availability: High · High · High
Fix status: No fix listed

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA. Impact type from CWE-190 and the CVSS impact.

Summary

An integer overflow vulnerability in 'pdf-image.c' in Artifex's MuPDF version 1.27.0 allows an attacker to maliciously craft a PDF that can trigger an integer overflow within the 'pdf_load_image_imp' function. This allows a heap out-of-bounds write that could be exploited for arbitrary code execution.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00217 12th percentileScored 2026-11-07

Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
Artifex Software Inc. PyMuPDF	MuPDF	up to 1.27.0	—	No fix listed	CNA

MuPDF VendorArtifex Software Inc. *PyMuPDF* Affected up to 1.27.0 Fixed in — No fix listed CNA

Remediation

No fixed version listed by the sources yet.

Vendor assessments

Red Hat

Red Hat's page for this CVE →

Not affected: 1 product

Red Hat

Timeline

2026-10-02 Threatist record created from CVE-2026-3308
2026-10-03 Alias added: GHSA-6jrq-hjxp-2x5r

References

Other 3

TI-2026-02617 Path traversal in Artifex Software Inc. *PyMuPDF* PyMuPDF CVSS 3.1HIGH 7.5

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences