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

Summaryinfo

A vulnerability classified as problematic was found in QuickJS-NG up to 0.15.x. The affected element is the function js_proxy_get_own_property_names of the file quickjs.c of the component Proxy. Such manipulation leads to integer overflow. This vulnerability is uniquely identified as CVE-2026-120438. Local access is required to approach this attack. No exploit exists. Upgrading the affected component is advised.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in QuickJS-NG up to 0.15.x. Affected by this issue is the function js_proxy_get_own_property_names of the file quickjs.c of the component Proxy. 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_proxy_get_own_property_names() in quickjs.c that causes a heap buffer overflow on 32-bit hosts. Attackers running JavaScript can return a large array-like object from a Proxy ownKeys trap to wrap the allocation size, causing crashes or potential code execution.

The advisory is available at github.com. This vulnerability is handled as CVE-2026-120438 since 11/02/2026. The exploitation is known to be easy. Local access is required to approach this attack. Successful exploitation requires user interaction by the victim. Technical details are known, but there is no available exploit.

Upgrading to version 0.16.0 eliminates this vulnerability.

If you want to get best quality of vulnerability data, you may have to visit VulDB.

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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• 🔒
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CPE 2.2info

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• 🔒
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If you want to get best quality of vulnerability data, you may have to visit VulDB.

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