{"answers":{"affected":"","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-3979 exists.","fix":"No fix has been published for CVE-2026-3979 yet. Limit exposure of the affected software until one is available.","what":"CVE-2026-3979 is a medium-severity use after free vulnerability in quickjs-ng quickjs, published on 12 Mar 2026. It can only be exploited from the same machine or local network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-3979 and fix it if it is affected.\n\nWhat it is: CVE-2026-3979 is a medium-severity use after free vulnerability in quickjs-ng quickjs, published on 12 Mar 2026. It can only be exploited from the same machine or local network, with no action from the victim.\nExploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-3979 exists.\n\nAffected product: quickjs-ng quickjs. No package-level version data is available, so check the vendor advisory linked from the reference page.\n\nTask:\n1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.\n2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.\n3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.\n4. Run the tests and summarise what changed and why.\n5. If nothing in the project is affected, say so and change nothing.\n\nReference: https://insights.sbomify.com/CVE-2026-3979/ (Markdown: https://insights.sbomify.com/CVE-2026-3979/index.md)","id":"CVE-2026-3979","markdown":"https://insights.sbomify.com/CVE-2026-3979/index.md","name":"CVE-2026-3979","record":{"aliases":["GHSA-gr63-2w3v-w2gp","UBUNTU-CVE-2026-3979"],"analysis":{"component_type":"library","fix_type":"patch","impacts":["code_execution","denial_of_service"],"network_reachable":"adjacent_or_local","non_default_config":false,"product_category":"JavaScript engine library","requires_auth":"low_privilege","summary":"A local attacker can exploit a use-after-free flaw in the quickjs-ng JavaScript engine to potentially execute arbitrary code or cause a denial of service.","user_interaction":"not_required","vuln_class":"use_after_free"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"VulDB","cpe":[],"cvss":{"score":4.8,"severity":"medium","source":"cna","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","version":"4.0"},"cwes":[{"id":"CWE-416","name":"Use After Free"},{"id":"CWE-119","name":"Improper Restriction of Operations within the Bounds of a Memory Buffer"}],"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.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"weaponised"},"has_fix":false,"headline":"quickjs-ng quickjs quickjs.c js_iterator_concat_return use after free","id":"CVE-2026-3979","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"use_after_free","year":"2026"},"n_packages":0,"n_references":8,"next":{"headline":"itsourcecode Online Doctor Appointment System patient_action.php sql injection","id":"CVE-2026-3980"},"packages":[],"prev":{"headline":"D-Link DIR-513 formEasySetupWizard3 stack-based overflow","id":"CVE-2026-3978"},"products":["quickjs"],"published":"2026-03-12","related":[],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":"no","exploitation":"poc","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-03-12","vendors":["quickjs-ng"]},"summary":"A local attacker can exploit a use-after-free flaw in the quickjs-ng JavaScript engine to potentially execute arbitrary code or cause a denial of service.","url":"https://insights.sbomify.com/CVE-2026-3979/"}