{"cve":"CVE-2026-23956","nvd":{"published":"2026-01-22T02:15:52.310","modified":"2026-06-17T10:22:20.970","status":"Modified","description":"seroval facilitates JS value stringification, including complex structures beyond JSON.stringify capabilities. In versions 0.2.0 through 1.4.0, overriding RegExp serialization with extremely large patterns can exhaust JavaScript runtime memory during deserialization. Additionally, overriding RegExp serialization with patterns that trigger catastrophic backtracking can lead to ReDoS (Regular Expression Denial of Service). This issue has been fixed in version 1.4.1.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","score":7.5},"cwes":["CWE-1333"],"references":["https://github.com/lxsmnsyc/seroval/blob/v0.2.0/packages/seroval/src/index.ts#L90","https://github.com/lxsmnsyc/seroval/commit/ce9408ebc87312fcad345a73c172212f2a798060","https://github.com/lxsmnsyc/seroval/security/advisories/GHSA-hx9m-jf43-8ffr"],"products":["lxsmnsyc:seroval"],"source":"nvd","synced_at":"2026-10-19T22:21:16.563232421+00:00"},"epss":{"cve":"CVE-2026-23956","score":0.00534,"percentile":0.45073,"date":"2026-11-01"},"kev":null,"osv":[{"id":"GHSA-hx9m-jf43-8ffr","url":"https://osv.dev/vulnerability/GHSA-hx9m-jf43-8ffr","summary":"seroval affected by Denial of Service via RegExp serialization","modified":"2026-05-20T01:00:15.710504617Z","packages":[{"ecosystem":"npm","name":"seroval","purl":"pkg:npm/seroval","ranges":[">=0.2.0 <1.4.1"],"fixed":["1.4.1"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}