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CVE-2026-0821

7.3 · HIGH

A vulnerability was determined in quickjs-ng quickjs up to 0.11.0.

Published Jan 10, 2026CWE-119EPSS 0.52%

Overview

CVE-2026-0821 is a high-severity vulnerability. It was published on January 10, 2026 and has a CVSS 3.1 base score of 7.3 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.3, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical 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.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

GitHubgithub.com/quickjs-ng/quickjs/GitHubgithub.com/quickjs-ng/quickjs/commit/c5d80831e51e48a83eab16ea867be87f091783c5GitHubgithub.com/quickjs-ng/quickjs/issues/1296GitHubgithub.com/quickjs-ng/quickjs/issues/1296#issue-3780003395GitHubgithub.com/quickjs-ng/quickjs/pull/1299Refvuldb.com/?ctiid.340355Refvuldb.com/?id.340355Refvuldb.com/?submit.731780

How CyberStrike helps

Frequently asked questions

What is CVE-2026-0821?

CVE-2026-0821 is a high-severity vulnerability. It was published on January 10, 2026 and has a CVSS 3.1 base score of 7.3 (HIGH).

How severe is CVE-2026-0821?

This vulnerability has a CVSS 3.1 base score of 7.3, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2026-0821?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-0821?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-0821 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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