QuickJS-NG up to 0.15.x quickjs.c js_typed_array_sort integer overflow

Summaryinfo

A vulnerability described as critical has been identified in QuickJS-NG up to 0.15.x. The impacted element is the function js_typed_array_sort of the file quickjs.c. Such manipulation leads to integer overflow. This vulnerability is traded as CVE-2026-120439. The attack may be launched remotely. There is no exploit available. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability was found in QuickJS-NG up to 0.15.x and classified as critical. Affected by this issue is the function js_typed_array_sort of the file quickjs.c. The manipulation with an unknown input leads to a integer overflow vulnerability. Using CWE to declare the problem leads to CWE-190. The product performs a calculation that can produce an integer overflow or wraparound, when the logic assumes that the resulting value will always be larger than the original value. This can introduce other weaknesses when the calculation is used for resource management or execution control. Impacted is confidentiality, integrity, and availability. CVE summarizes:

QuickJS-NG before 0.16.0 contains an integer overflow in js_typed_array_sort() in quickjs.c that allows attackers to cause a heap buffer overflow on 32-bit hosts. Attackers who can run JavaScript can call TypedArray.prototype.sort with a comparator on a typed array near 2^30 elements, wrapping the allocation size and writing indices past the buffer to crash or potentially execute code.

The advisory is available at github.com. This vulnerability is handled as CVE-2026-120439 since 11/02/2026. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. Technical details are known, but there is no available exploit.

Upgrading to version 0.16.0 eliminates this vulnerability.

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Productinfo

Name

• QuickJS-NG

Version

• 0.1
• 0.2
• 0.3
• 0.4
• 0.5
• 0.6
• 0.7
• 0.8
• 0.9
• 0.10
• 0.11
• 0.12
• 0.13
• 0.14
• 0.15

CPE 2.3info

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CPE 2.2info

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