{"id":"CVE-2026-115897","summary":"Serialize JavaScript: Cross-site scripting (XSS) via unescaped \u003c/script at the end of a serialized function body","details":"Serialize JavaScript serializes JavaScript values to a superset of JSON that includes regular expressions and functions. Prior to 7.1.3, the function-source escaping logic does not neutralize a bare closing-script prefix when attacker-influenced function source text ends exactly at that prefix. Because each function body is escaped independently, a delimiter supplied by surrounding serialized output can terminate an HTML script element, and a later serialized value supplies injected markup that becomes a live element in the page. Exploitation requires control of a serialized function's source text, such as through a spoofed toString(). This issue is fixed in version 7.1.3.","aliases":["CVE-2026-115754","GHSA-m5mm-p8h7-m29v"],"modified":"2026-10-25T02:46:43.732099585Z","published":"2026-10-23T21:37:41.097Z","database_specific":{"cna_assigner":"GitHub_M","cwe_ids":["CWE-79"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/115xxx/CVE-2026-115897.json","unresolved_ranges":[{"extracted_events":[{"range":[{"fixed":"7.1.3"}],"source":"AFFECTED_FIELD","strategy":"StringRangeExpression"}]},{"extracted_events":[{"range":[{"fixed":"7.1.3"},{"fixed":"7.1.3"}],"source":"DESCRIPTION"}]}]},"references":[{"type":"WEB","url":"https://github.com/yahoo/serialize-javascript/releases/tag/v7.1.3"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/115xxx/CVE-2026-115897.json"},{"type":"ADVISORY","url":"https://github.com/yahoo/serialize-javascript/security/advisories/GHSA-m5mm-p8h7-m29v"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-115897"},{"type":"FIX","url":"https://github.com/yahoo/serialize-javascript/commit/2864b3c6260a3bfd52d2db3e70d1a079de108a61"},{"type":"FIX","url":"https://github.com/yahoo/serialize-javascript/pull/235"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/yahoo/serialize-javascript","events":[{"introduced":"0"},{"fixed":"2864b3c6260a3bfd52d2db3e70d1a079de108a61"},{"fixed":"4d36b828f7c1c6a1f0de9ef932fefadcca0edace"}],"database_specific":{"extracted_events":[{"range":[{"fixed":"2864b3c6260a3bfd52d2db3e70d1a079de108a61"}],"source":"REFERENCES_COMMIT"},{"range":[{"fixed":"4d36b828f7c1c6a1f0de9ef932fefadcca0edace"}],"source":"REFERENCES_TAG","original_tag":"v7.1.3"}]}}],"versions":["v7.1.2","v7.1.1","v7.1.0","v7.0.7","v7.0.6","v7.0.5","v7.0.4","v7.0.3","v7.0.2","v7.0.1","v7.0.0","v6.0.2","v6.0.1","v6.0.0","v5.0.1","v5.0.0","v4.0.0","v3.1.0","v3.0.0","v2.1.2","v2.1.1","v2.1.0","v2.0.0","v1.9.1","v1.9.0","v1.8.0","v1.7.0","v1.6.1","v1.6.0","v1.5.0","v1.4.0","v1.3.0","v1.2.0","v1.1.2","v1.1.1","v1.1.0","v1.0.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-115897.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N"}]}