{"cve":"CVE-2026-53944","nvd":{"published":"2026-06-24T19:17:11.957","modified":"2026-10-25T22:10:00.150","status":"Deferred","description":"Ghost is a Node.js content management system. From 6.0.9 until 6.21.1, when making an external request, it is possible to bypass the IP filter that ensures the request isn't going to an internal service using an IPv6 literal which maps to a private IPv4 address. This vulnerability is fixed in 6.21.1.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N","score":5.8},"cwes":["CWE-184","CWE-918"],"references":["https://github.com/TryGhost/Ghost/security/advisories/GHSA-wvp2-4qqp-4h3r"],"products":[],"source":"nvd","synced_at":"2026-10-25T23:44:33.281319194+00:00"},"epss":{"cve":"CVE-2026-53944","score":0.00329,"percentile":0.25758,"date":"2026-10-25"},"kev":null,"osv":[{"id":"GHSA-wvp2-4qqp-4h3r","url":"https://osv.dev/vulnerability/GHSA-wvp2-4qqp-4h3r","summary":"Ghost: Private IP filtering bypass to make server-side requests to internal services","modified":"2026-08-04T21:30:19.858634695Z","packages":[{"ecosystem":"npm","name":"ghost","purl":"pkg:npm/ghost","ranges":[">=6.0.9 <6.21.1"],"fixed":["6.21.1"]}]}],"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."]}