{"id":"CVE-2026-88378","title":"QuickJS commit 04be24600 contains a heap out-of-bounds write condition in JS_ReadFunctionTag().","summary":"QuickJS commit 04be24600 contains a heap out-of-bounds write condition in JS_ReadFunctionTag().","severity":"critical","cvss":9.8,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","cwe":["CWE-787"],"published":"2026-09-24","updated":"2026-09-29","sourceUpdated":"2026-09-29T03:17:21.100","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-88378","references":[{"url":"https://github.com/bellard/quickjs/issues/549","label":"cve@mitre.org"},{"url":"https://github.com/bellard/quickjs/pull/553","label":"cve@mitre.org"},{"url":"https://github.com/bellard/quickjs/pull/553/changes/42526037cfc0b2a94a875c0de0f4bbeaf597a542","label":"cve@mitre.org"},{"url":"https://github.com/bellard/quickjs/issues/549","label":"134c704f-9b21-4f2e-91b3-4a467353bcc0"}],"tags":["nvd","cve.org","exploit-available"],"exploitAvailable":true,"ssvc":{"exploitation":"poc","automatable":"yes","technicalImpact":"total","timestamp":"2026-09-29T02:31:06.896356Z"},"ingestedAt":"2026-09-24T16:47:15.853Z","epss":0.00562,"epssPercentile":0.46526,"slug":"CVE-2026-88378","body":"## Overview\n\nQuickJS commit 04be24600 contains a heap out-of-bounds write condition in JS_ReadFunctionTag().\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"abyssal","depthScore":66,"depthScoreParts":{"impact":53.9,"likelihood":0.1,"exploitation":12,"ransomware":0},"changes":[{"seq":212228,"id":"CVE-2026-88378","ts":1790652423060,"field":"exploit_available","old":"false","new":"true"},{"seq":212227,"id":"CVE-2026-88378","ts":1790652423060,"field":"cvss","old":null,"new":"9.8"},{"seq":212226,"id":"CVE-2026-88378","ts":1790652423060,"field":"severity","old":"none","new":"critical"}]}