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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.

PUBLISHED Reserved 2026-03-11 | Published 2026-03-12 | Updated 2026-03-12 | Assigner VulDB




MEDIUM: 4.8CVSS: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
MEDIUM: 5.3CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:O/RC:C
MEDIUM: 5.3CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:O/RC:C
4.3AV:L/AC:L/Au:S/C:P/I:P/A:P/E:POC/RL:OF/RC:C

Problem types

Use After Free

Memory Corruption

Product status

0.12.0
affected

0.12.1
affected

Timeline

2026-03-11:Advisory disclosed
2026-03-11:VulDB entry created
2026-03-11:VulDB entry last update

Credits

im-razvan (VulDB User) reporter

References

vuldb.com/?id.350414 (VDB-350414 | quickjs-ng quickjs quickjs.c js_iterator_concat_return use after free) vdb-entry technical-description

vuldb.com/?ctiid.350414 (VDB-350414 | CTI Indicators (IOB, IOC, IOA)) signature permissions-required

vuldb.com/?submit.769600 (Submit #769600 | quickjs-ng QuickJS 0.12.1 Use-After-Free) third-party-advisory

github.com/quickjs-ng/quickjs/issues/1368 issue-tracking

github.com/quickjs-ng/quickjs/pull/1370 issue-tracking patch

github.com/quickjs-ng/quickjs/issues/1368 exploit issue-tracking

github.com/...ommit/daab4ad4bae4ef071ed0294618d6244e92def4cd patch

github.com/quickjs-ng/quickjs/ product

cve.org (CVE-2026-3979)

nvd.nist.gov (CVE-2026-3979)

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