What’s Vulnerable › Vulnerabilities

CVE-2026-0821: quickjs-ng quickjs quickjs.c js_typed_array_constructor heap-based overflow

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2026-01-10 · updated 2026-06-17
• Weakness: CWE-119

Description

A vulnerability was determined in quickjs-ng quickjs up to 0.11.0. This vulnerability affects the function js_typed_array_constructor of the file quickjs.c. Executing a manipulation can lead to heap-based buffer overflow. The attack may be launched remotely. The exploit has been publicly disclosed and may be utilized. This patch is called c5d80831e51e48a83eab16ea867be87f091783c5. A patch should be applied to remediate this issue.

Affected products

• quickjs-ng quickjs: through 0.11.0

References

• https://github.com/quickjs-ng/quickjs/
• https://github.com/quickjs-ng/quickjs/commit/c5d80831e51e48a83eab16ea867be87f091783c5
• https://github.com/quickjs-ng/quickjs/issues/1296
• https://github.com/quickjs-ng/quickjs/issues/1296#issue-3780003395
• https://github.com/quickjs-ng/quickjs/pull/1299
• https://vuldb.com/?ctiid.340355
• https://vuldb.com/?id.340355
• https://vuldb.com/?submit.731780

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