{"id":"CVE-2026-88378","published":"2026-09-24T17:17:07.550","lastModified":"2026-09-29T03:17:21.100","description":"QuickJS commit 04be24600 contains a heap out-of-bounds write condition in JS_ReadFunctionTag().","cvssScore":9.8,"cvssSeverity":"CRITICAL","cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","cwes":["CWE-787"],"vendors":[],"products":[],"references":[{"url":"https://github.com/bellard/quickjs/issues/549","tags":[]},{"url":"https://github.com/bellard/quickjs/pull/553","tags":[]},{"url":"https://github.com/bellard/quickjs/pull/553/changes/42526037cfc0b2a94a875c0de0f4bbeaf597a542","tags":[]},{"url":"https://github.com/bellard/quickjs/issues/549","tags":[]}],"exploitRefs":[{"url":"https://github.com/bellard/quickjs/issues/549","tags":[]},{"url":"https://github.com/bellard/quickjs/pull/553","tags":[]},{"url":"https://github.com/bellard/quickjs/pull/553/changes/42526037cfc0b2a94a875c0de0f4bbeaf597a542","tags":[]},{"url":"https://github.com/bellard/quickjs/issues/549","tags":[]}],"hasPoc":true,"ai":{"summary":"The flaw is a heap out-of-bounds write condition in QuickJS, which can lead to arbitrary code execution if exploited. This matters because it allows attackers to execute malicious code, leading to severe system compromise.","exploitability":"Exploitation is moderately difficult requiring specific input to trigger the heap out-of-bounds condition. Precondition is the presence of vulnerable QuickJS code in the application.","blast_radius":"If exploited, the impact could be severe, leading to full system compromise and potential data loss or theft.","remediation":"Upgrade to the fixed version 04be24600 or later.","detection":"No reliable host or network indicator is derivable from the published description.","tags":["rce","web","js"],"model":"qwen2.5:7b-instruct","analyzedAt":"2026-09-29T08:51:01.777Z"}}