{"id":"CVE-2026-110715","title":"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","summary":"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 dens…","severity":"medium","cvss":6.1,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:H","cwe":["CWE-787"],"vendor":"Artifex Software","product":"MuJS","affected":["MuJS >= 1.3.6 < 1.3.9"],"published":"2026-10-14","updated":"2026-10-15","sourceUpdated":"2026-10-15T20:17:08.993","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-110715","references":[{"url":"https://codeberg.org/ccxvii/mujs","label":"disclosure@vulncheck.com"},{"url":"https://codeberg.org/ccxvii/mujs/commit/32064e10caa45e68fc87331ca53d042049cc9396","label":"disclosure@vulncheck.com"},{"url":"https://codeberg.org/ccxvii/mujs/src/commit/307f18c4216420f2f56e22d8e7040baa39a6304a/jsarray.c#L245","label":"disclosure@vulncheck.com"},{"url":"https://hackmd.io/@haind-pwn/mujs-array-length-flat-oob","label":"disclosure@vulncheck.com"},{"url":"https://mujs.com/downloads/","label":"disclosure@vulncheck.com"},{"url":"https://www.vulncheck.com/advisories/mujs-1.3.6-before-1.3.9-heap-out-of-bounds-read-write-via-array-prototype-sort","label":"disclosure@vulncheck.com"}],"tags":["nvd","cve.org","exploit-available"],"epss":0.0017,"epssPercentile":0.06326,"exploitAvailable":true,"ssvc":{"exploitation":"poc","automatable":"no","technicalImpact":"partial","timestamp":"2026-10-15T19:12:30.683487Z"},"ingestedAt":"2026-10-14T16:40:32.116Z","slug":"CVE-2026-110715","body":"## Overview\n\nMuJS 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":46,"depthScoreParts":{"impact":33.6,"likelihood":0,"exploitation":12,"ransomware":0},"changes":[{"seq":222745,"id":"CVE-2026-110715","ts":1792097086682,"field":"exploit_available","old":"false","new":"true"}]}