A flaw has been found in quickjs-ng quickjs up to 0.12.1. This affects the function js_iterator_concat_return of the file quickjs.c. This manipulation causes use after free. The attack requires local access. The exploit has been published and may be used. Patch name: daab4ad4bae4ef071ed0294618d6244e92def4cd. Applying a patch is the recommended action to fix this issue.

Metrics

Attack Vector Local

Attack Complexity Low

Privileges Required Low

Attack Requirements None

User Interaction None

Vulnerable System Confidentiality Impact Low

Vulnerable System Integrity Impact Low

Vulnerable System Availability Impact Low

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

Attack Vector Local

Attack Complexity Low

Privileges Required Low

Scope Unchanged

Confidentiality Impact Low

Integrity Impact Low

Availability Impact Low

User Interaction None

Attack Vector Local

Attack Complexity Low

Privileges Required Low

Scope Unchanged

Confidentiality Impact Low

Integrity Impact Low

Availability Impact Low

User Interaction None

Access Vector Local

Access Complexity Low

Authentication Single

Confidentiality Impact Partial

Integrity Impact Partial

Availability Impact Partial

AV:L/AC:L/Au:S/C:P/I:P/A:P/E:POC/RL:OF/RC:C

This CVE is not in the KEV list.

Exploitation poc

Automatable no

Technical Impact partial

Affected Vendors & Products

Vendors Products
Quickjs-ng
  • Quickjs

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References
Link Providers
https://github.com/quickjs-ng/quickjs/ cve-icon cve-icon
https://github.com/quickjs-ng/quickjs/commit/daab4ad4bae4ef071ed0294618d6244e92def4cd cve-icon cve-icon
https://github.com/quickjs-ng/quickjs/issues/1368 cve-icon cve-icon
https://github.com/quickjs-ng/quickjs/issues/1368#issue-4004680962 cve-icon cve-icon
https://github.com/quickjs-ng/quickjs/pull/1370 cve-icon cve-icon
https://vuldb.com/?ctiid.350414 cve-icon cve-icon
https://vuldb.com/?id.350414 cve-icon cve-icon
https://vuldb.com/?submit.769600 cve-icon cve-icon
History

Fri, 13 Mar 2026 10:00:00 +0000

Type Values Removed Values Added
First Time appeared Quickjs-ng
Quickjs-ng quickjs
Vendors & Products Quickjs-ng
Quickjs-ng quickjs

Thu, 12 Mar 2026 17:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Thu, 12 Mar 2026 03:45:00 +0000

Type Values Removed Values Added
Description A flaw has been found in quickjs-ng quickjs up to 0.12.1. This affects the function js_iterator_concat_return of the file quickjs.c. This manipulation causes use after free. The attack requires local access. The exploit has been published and may be used. Patch name: daab4ad4bae4ef071ed0294618d6244e92def4cd. Applying a patch is the recommended action to fix this issue.
Title quickjs-ng quickjs quickjs.c js_iterator_concat_return use after free
Weaknesses CWE-119
CWE-416
References
Metrics cvssV2_0

{'score': 4.3, 'vector': 'AV:L/AC:L/Au:S/C:P/I:P/A:P/E:POC/RL:OF/RC:C'}

cvssV3_0

{'score': 5.3, 'vector': 'CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:O/RC:C'}

cvssV3_1

{'score': 5.3, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:O/RC:C'}

cvssV4_0

{'score': 4.8, 'vector': 'CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P'}
cve-icon MITRE

Status: PUBLISHED

Assigner: VulDB

Published: 2026-03-12T03:32:14.860Z

Updated: 2026-03-12T16:16:09.904Z

Reserved: 2026-03-11T14:26:13.418Z

Link: CVE-2026-3979

cve-icon Vulnrichment

Updated: 2026-03-12T13:45:17.104Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-03-12T04:16:40.440

Modified: 2026-03-12T21:07:53.427

Link: CVE-2026-3979

cve-icon Redhat

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