quickjs-ng quickjs up to 0.11.0 quickjs.c js_typed_array_constructor heap-based overflow

Summaryinfo

A vulnerability, which was classified as critical, has been found in quickjs-ng quickjs up to 0.11.0. This issue affects the function js_typed_array_constructor of the file quickjs.c. The manipulation leads to heap-based overflow. This vulnerability is referenced as CVE-2026-0821. Remote exploitation of the attack is possible. Furthermore, an exploit is available. To fix this issue, it is recommended to deploy a patch.

Detailsinfo

A vulnerability, which was classified as critical, has been found in quickjs-ng quickjs up to 0.11.0. This issue affects the function js_typed_array_constructor of the file quickjs.c. The manipulation with an unknown input leads to a heap-based overflow vulnerability. Using CWE to declare the problem leads to CWE-122. A heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc(). Impacted is confidentiality, integrity, and availability.

It is possible to read the advisory at github.com. The identification of this vulnerability is CVE-2026-0821. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Technical details as well as a public exploit are known.

The exploit is available at github.com. It is declared as proof-of-concept. The vulnerability scanner Nessus provides a plugin with the ID 282569 (Linux Distros Unpatched Vulnerability : CVE-2026-0821), which helps to determine the existence of the flaw in a target environment.

Applying the patch c5d80831e51e48a83eab16ea867be87f091783c5 is able to eliminate this problem. The bugfix is ready for download at github.com.

The vulnerability is also documented in the databases at Tenable (282569) and EUVD (EUVD-2026-1843). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Vendor

• quickjs-ng

Name

• quickjs

Version

• 0.1
• 0.2
• 0.3
• 0.4
• 0.5
• 0.6
• 0.7
• 0.8
• 0.9
• 0.10
• 0.11.0

License

• open-source

Website

• Product: https://github.com/quickjs-ng/quickjs/

CPE 2.3info

• 🔒
• 🔒
• 🔒

CPE 2.2info

• 🔒
• 🔒
• 🔒

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CVSSv3info

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Exploitinginfo

Threat Intelligenceinfo

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Entryinfo

Submitinfo

Accepted

• Submit #731780: quickjs-ng quickjs v0.11.0 Heap-based Buffer Overflow (by mcsky23)

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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