CVE-2026-120439 QuickJS-NG - Integer Overflow

QuickJS-NG < 0.16.0 contains an integer overflow in js_typed_array_sort() in quickjs.c, letting attackers running JavaScript cause heap buffer overflow on 32-bit hosts by sorting large typed arrays with a comparator.

CVSS base score 7.0 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
View the NVD record ↗

Details

Type
Integer Overflow
Impact
Remote Code Execution, Denial Of Service
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:H
Published
2 November 2026
Updated
3 November 2026
Weakness
CWE-190

Vendor fix

Update to version 0.16.0 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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