{"id":"CVE-2026-3979","state":"PUBLISHED","title":"quickjs-ng quickjs quickjs.c js_iterator_concat_return use after free","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.","publishedAt":"2026-03-12T03:32:14.860Z","updatedAt":"2026-03-12T16:16:09.904Z","severity":{"score":4.8,"label":"Medium","version":"4.0","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","source":"VulDB"},"assigner":"VulDB","products":["quickjs-ng quickjs"],"affected":[{"vendor":"quickjs-ng","product":"quickjs","versions":[{"version":"0.12.0","status":"affected"},{"version":"0.12.1","status":"affected"}]}],"references":["https://vuldb.com/?id.350414","https://vuldb.com/?ctiid.350414","https://vuldb.com/?submit.769600","https://github.com/quickjs-ng/quickjs/issues/1368","https://github.com/quickjs-ng/quickjs/pull/1370","https://github.com/quickjs-ng/quickjs/issues/1368#issue-4004680962","https://github.com/quickjs-ng/quickjs/commit/daab4ad4bae4ef071ed0294618d6244e92def4cd","https://github.com/quickjs-ng/quickjs/"],"weaknesses":["CWE-416","CWE-119"],"ingestedAt":"2026-10-29T20:11:50.837Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/3xxx/CVE-2026-3979.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-3979","state":"PUBLISHED","datePublished":"2026-03-12T03:32:14.860Z","dateUpdated":"2026-03-12T16:16:09.904Z","assignerShortName":"VulDB","assignerOrgId":"1af790b2-7ee1-4545-860a-a788eba489b5","dateReserved":"2026-03-11T14:26:13.418Z"},"containers":{"cna":{"title":"quickjs-ng quickjs quickjs.c js_iterator_concat_return use after free","descriptions":[{"lang":"en","value":"A flaw has been found in quickjs-ng quickjs up to 0.12.1. 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