← Vulnerability feed

Vulnerability record · CVE-2026-0821 · published 10 January 2026

CVE-2026-0821: Quickjs-ng quickjs memory buffer overflow vulnerability

QQuickjs Ng · Quickjs

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.

5.5 CVSS 4.0 Medium EPSS 0.50% · top 59.3% CWE-119 · Memory buffer overflowCWE-122 · Heap-based buffer overflow
5.5CVSS 4.0 base score, v2 7.5
0.50%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
8References, 2 tagged exploit
17 Jun 2026Last modified by NVD

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.

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/quickjs-ng/quickjs/
https://github.com/quickjs-ng/quickjs/commit/c5d80831e51e48a83eab16ea867be87f091783c5 Patch
https://github.com/quickjs-ng/quickjs/issues/1296 ExploitIssue TrackingVendor Advisory
https://github.com/quickjs-ng/quickjs/issues/1296#issue-3780003395 ExploitIssue TrackingVendor Advisory
https://github.com/quickjs-ng/quickjs/pull/1299 Issue Tracking
https://vuldb.com/?ctiid.340355 Permissions RequiredVDB Entry
https://vuldb.com/?id.340355 Third Party AdvisoryVDB Entry
https://vuldb.com/?submit.731780 Third Party AdvisoryVDB Entry

Track CVE-2026-0821 inside VULONE

Watch it alongside the ransomware crews, C2 infrastructure and forum chatter that reference it, query it through the API and pull it into your SIEM over TAXII.

Start free Open in platform

Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

8.4CVE-2025-46688Quickjs-ng quickjs vulnerabilityquickjs-ng through 0.9.0 has an incorrect size calculation in JS_ReadBigInt for a BigInt, leading to a heap-based buffer overflow. QuickJS before 202…EPSS 0.32%7.8CVE-2025-46687Bellard quickjs allocation without limits vulnerabilityquickjs-ng through 0.9.0 has a missing length check in JS_ReadString for a string, leading to a heap-based buffer overflow. QuickJS before 2025-04-26…EPSS 0.30%5.3CVE-2024-13903Quickjs-ng quickjs memory buffer overflow vulnerabilityA vulnerability was found in quickjs-ng QuickJS up to 0.8.0. It has been declared as problematic. Affected by this vulnerability is the function JS_G…EPSS 0.70%2.1CVE-2026-1145Quickjs-ng quickjs memory buffer overflow vulnerabilityA flaw has been found in quickjs-ng quickjs up to 0.11.0. Affected by this vulnerability is the function js_typed_array_constructor_ta of the file qu…EPSS 0.40%2.1CVE-2026-1144Quickjs-ng quickjs memory buffer overflow vulnerabilityA vulnerability was detected in quickjs-ng quickjs up to 0.11.0. Affected is an unknown function of the file quickjs.c of the component Atomics Ops H…EPSS 0.41%2.1CVE-2026-0822Quickjs-ng quickjs memory buffer overflow vulnerabilityA vulnerability was identified in quickjs-ng quickjs up to 0.11.0. This issue affects the function js_typed_array_sort of the file quickjs.c. The man…EPSS 0.46%9.5CVE-2026-88772Citrix netscaler application delivery controller memory buffer overflow vulnerabilityVulnerability in Citrix NetScaler ADC and Citrix NetScaler Gateway. This issue affects ADC: before 14.1-73.37, before 13.1-64.23, before 14.1-73.37 F…KEV8.8CVE-2026-8452Citrix NetScaler ADC and Gateway memory buffer overflow causes DoSCVE-2026-8452 is a memory buffer overflow (CWE-119) in Citrix NetScaler ADC and NetScaler Gateway that leads to unpredictable or erroneous behavior a…KEVEPSS 1.0%analysed

Source: NIST National Vulnerability Database (record CVE-2026-0821), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.