CVE-2026-110715CWE-787

CVE-2026-110715

Medium · published October 14, 2026

CVSS v3.1
6.1
EPSS
0%
Percentile
6.3
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
6.1 · MEDIUM
Vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:H
CVSS v4.0
6.9 · CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N
EPSS
0.00172 · 6.3th percentile
Weakness
CWE-787 · Out-of-bounds Write
Published
2026-10-14T20:17Z
References (6)
https://codeberg.org/ccxvii/mujs · [email protected]https://codeberg.org/ccxvii/mujs/commit/32064e10caa45e68fc87331ca53d042049cc9396 · [email protected]https://codeberg.org/ccxvii/mujs/src/commit/307f18c4216420f2f56e22d8e7040baa39a6304a/jsarray.c#L245 · [email protected]https://hackmd.io/@haind-pwn/mujs-array-length-flat-oob · [email protected]https://mujs.com/downloads/ · [email protected]https://www.vulncheck.com/advisories/mujs-1.3.6-before-1.3.9-heap-out-of-bounds-read-write-via-array-prototype-sort · [email protected]
EPSS history
Timeline
  • 16 OCT 03:27Z
    EPSS moved — → 0%
    epss
  • 14 OCT 15:01Z
    MuJS 1.3.6 before 1.3.9 Heap Out-of-Bounds Read/Write via Array.prototype.sort
    cvelistv5
  • 14 OCT 15:01Z
    MuJS 1.3.6 before 1.3.9 Heap Out-of-Bounds Read/Write via Array.prototype.sort
    cvelistv5