CVE-2026-110715
Medium
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.
SeverityMedium
CVSS6.1
Exploit probability—
ProductMuJS
PublishedOct 14, 2026
First seenOct 14, 2026
Weakness typeCWE-787Out-of-bounds write
How to fix
Update
- Artifex Software MuJS1.3.9 or later
Vendor advisories
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Artifex Software MuJS | 1.3.6 ≤ v < 1.3.9 | 1.3.9 |
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