{"id":"CVE-2026-34043","aliases":["GHSA-qj8w-gfj5-8c6v"],"url":"https://o3.security/vulnerability/CVE-2026-34043","summary":"Serialize JavaScript has CPU Exhaustion Denial of Service via crafted array-like objects","details":"Serialize JavaScript to a superset of JSON that includes regular expressions and functions. Prior to version 7.0.5, there is a Denial of Service (DoS) vulnerability caused by CPU exhaustion. When serializing a specially crafted \"array-like\" object (an object that inherits from Array.prototype but has a very large length property), the process enters an intensive loop that consumes 100% CPU and hangs indefinitely. This issue has been patched in version 7.0.5.","published":"2026-03-31T01:48:45.759Z","modified":"2026-08-07T11:49:19.933862646Z","cvss":{"score":5.9,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H"},"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"npm","name":"serialize-javascript","fixedVersion":"7.0.5"}],"fix":{"url":"https://github.com/yahoo/serialize-javascript/commit/f147e90269b58bb6e539cfdf3d0e20d6ad14204b","label":"yahoo/serialize-javascript@f147e90"},"references":[{"type":"WEB","url":"https://github.com/yahoo/serialize-javascript/releases/tag/v7.0.5"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/34xxx/CVE-2026-34043.json"},{"type":"ADVISORY","url":"https://github.com/yahoo/serialize-javascript/security/advisories/GHSA-qj8w-gfj5-8c6v"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-34043"},{"type":"FIX","url":"https://github.com/yahoo/serialize-javascript/commit/f147e90269b58bb6e539cfdf3d0e20d6ad14204b"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-07T11:49:19.933862646Z"}}