Is CVE-2026-3308 actively exploited?

No active exploitation of CVE-2026-3308 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-3308 be exploited remotely?

No. CVE-2026-3308 requires local access to exploit.

What is the CVSS score of CVE-2026-3308?

CVE-2026-3308 has a CVSS score of 7.8 (HIGH).

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HIGH

CVE-2026-3308

Published: March 31, 2026· Updated: Apr 2, 2026

7.8

CVSS v3.1

EPSS:0.01%probability of exploitation in 30 daysPercentile:2.2th

Official Description

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.

NVD Source

Technical Analysis

CVE-2026-3308 requires local access, meaning attackers must already have a foothold on the target system.

Exploitation does not require any privileges, though user interaction (Required) is needed, which slightly reduces the risk of mass automated attacks.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 7.8.