CVE-2026-110715 Details
Description
MuJS 1.3.6 before 1.3.9 contains a heap out-of-bounds read and write vulnerability in Array.prototype.sort that allows attackers to corrupt memory by inflating a simple array's length. Attackers can supply JavaScript that enlarges a dense array's length and calls sort, causing Ap_sort_cmp and Ap_sort_swap to access slots past the buffer and crash the process.
A heap out-of-bounds read and write vulnerability has been identified in MuJS versions 1.3.6 prior to 1.3.9. This vulnerability resides in the Array.prototype.sort method, where the logical length of a simple array can be inflated, leading to memory corruption. When the sort method is called, it accesses array slots beyond the allocated buffer, causing a crash. The issue is rooted in the way MuJS handles array lengths, allowing attackers to exploit the sorting mechanism.
The vulnerability has been fixed in MuJS version 1.3.9. Users should upgrade to this version or later.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Oct 14, 2026CISA-ADP
Assessed Oct 15, 2026References to Advisories, Solutions, and Tools
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Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-787 | Out-of-bounds Write | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| MuJS | >= 1.3.6, < 1.3.9 (semver) |
CPE
Remediation
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Change History
2 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Oct 15, 2026 | CVE Modified | CISA-ADP |
| Oct 14, 2026 | New CVE Received | [email protected] |