---
id: CVE-2026-88362
title: >-
  MuJS e892c9fdb contains an incorrect numeric conversion vulnerability in
  jsR_isindex() in jsrun.c
summary: >-
  MuJS e892c9fdb contains an incorrect numeric conversion vulnerability in
  jsR_isindex() in jsrun.c. A specially crafted JavaScript input containing an
  excessively large numeric array index can cause an out-of-range floating-point
  value to…
severity: high
cvss: 7.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'
cwe:
  - CWE-681
published: '2026-09-24'
updated: '2026-09-25'
sourceUpdated: '2026-09-25T17:17:17.660'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-88362'
references:
  - url: 'https://bugs.ghostscript.com/show_bug.cgi?id=709636'
    label: cve@mitre.org
  - url: >-
      https://cgit.ghostscript.com/cgi-bin/cgit.cgi/mujs.git/commit/?id=8a32c397b28fe45747ac4e9e4f3dca049825eda7
    label: cve@mitre.org
  - url: 'https://bugs.ghostscript.com/show_bug.cgi?id=709636'
    label: 134c704f-9b21-4f2e-91b3-4a467353bcc0
tags:
  - nvd
  - cve.org
  - exploit-available
exploitAvailable: true
ssvc:
  exploitation: poc
  automatable: 'yes'
  technicalImpact: partial
  timestamp: '2026-09-25T16:15:23.278438Z'
ingestedAt: '2026-09-24T15:45:56.654Z'
epss: 0.00416
epssPercentile: 0.35683
---

## Overview

MuJS e892c9fdb contains an incorrect numeric conversion vulnerability in jsR_isindex() in jsrun.c. A specially crafted JavaScript input containing an excessively large numeric array index can cause an out-of-range floating-point value to be converted to an integer without proper range validation. This results in undefined behavior and can cause process termination, leading to denial of service.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.