PT-2026-2027 · Unknown+1 · Quickjs-Ng+1

Mcsky23 + 1 · Published 2026-01-10 · Updated 2026-01-10 · CVE-2026-0821

Positive Technologies (AI Summary)

CVSS v3.1

9.8

Critical

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Name of the Vulnerable Software and Affected Versions quickjs-ng versions up to 0.11.0

Description A flaw exists in quickjs-ng up to version 0.11.0 due to a heap-based buffer overflow in the js typed array constructor function within the quickjs.c file. This issue can be triggered remotely through a manipulation. The exploit for this issue has been publicly disclosed.

Recommendations Apply the patch c5d80831e51e48a83eab16ea867be87f091783c5 to remediate this issue.

Exploit

Fix

Buffer Overflow

Heap Based Buffer Overflow

Weakness Enumeration

CWE-119

CWE-122

Related Identifiers

CVE-2026-0821

Affected Products

Debian

Quickjs-Ng

References · 19

• 🔥 https://github.com/quickjs-ng/quickjs/issues/1296#issue-3780003395 · Exploit
• https://github.com/quickjs-ng/quickjs/commit/c5d80831e51e48a83eab16ea867be87f091783c5 · Patch
• https://github.com/quickjs-ng/quickjs/issues/1296 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2026-0821 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2026-0821 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-0821 · Security Note
• https://cve.org/CVERecord?id=CVE-2026-0821 · Security Note
• https://ubuntu.com/security/CVE-2026-0821 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2026-0821 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2026-0821 · Vendor Advisory
• https://github.com/quickjs-ng/quickjs/pull/1299 · Note
• https://twitter.com/VulmonFeeds/status/2010025432247136385 · Twitter Post
• https://twitter.com/RedPacketSec/status/2010013448483053720 · Twitter Post
• https://vuldb.com/?ctiid.340355 · Note
• https://github.com/quickjs-ng/quickjs · Note