{"id":"BIT-ghost-2026-53945","revision":null,"records":[{"revision":"40c4094af99841a7b74bd0a5e5535db7","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-53945","aliases":[],"title":"Ghost: Server-side request forgery via DNS rebinding in external request handling","description":"Ghost is a Node.js content management system. From 6.0.9 until 6.21.1, Ghost’s private-IP check for outbound HTTP requests could be bypassed via DNS rebinding, allowing an attacker to coerce the Ghost server into reaching hosts on internal networks through features that issue external fetches. 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Updating a Docker-based Ghost instance [is documented here](https://docs.ghost.org/install/docker#updating-ghost). \n\nIf your Ghost is a Ghost-CLI install see our documentation on [updating it to the latest version here](https://docs.ghost.org/update). \n\n### Workarounds\n\nIf upgrading immediately is not possible, operators can reduce exposure by preventing the Ghost server from reaching sensitive internal ranges at the network layer — for example, egress firewall rules that block the Ghost process from initiating connections to RFC1918 networks, loopback, link-local (including `169.254.169.254`) and any other internal service ranges. Disabling features that trigger outbound fetches (oEmbed, webmentions, recommendations) will further limit the attack surface but does not remove the underlying issue.\n\n### References\n\nGhost thanks Oluwaseun Esther Folorunsho, Lakshmikanthan K ([@l3tchupkt](https://github.com/l3tchupkt)), [Offgrid Security](https://www.offgridsec.com/), and Baki for disclosing this vulnerability responsibly.\n\n### For more information\n\nIf you have any questions or comments about this advisory, email us at [security@ghost.org](mailto:security@ghost.org).","state":0,"publishedAt":"2026-08-04T21:24:12+00:00","modifiedAt":"2026-08-04T21:30:19.7864346+00:00","affected":[{"ecosystem":"npm","name":"ghost","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"6.0.9"},{"kind":"fixed","version":"6.21.2"}]}],"versions":[],"rawVersionEvidence":null}],"metrics":[{"system":"CVSS_V3","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:L/A:N","score":null,"severity":null},{"system":"Publisher rating","vector":null,"score":null,"severity":"MODERATE"}],"references":["https://github.com/TryGhost/Ghost/security/advisories/GHSA-ch52-px8q-f22j","https://nvd.nist.gov/vuln/detail/CVE-2026-53945","https://github.com/TryGhost/Ghost/pull/26754","https://github.com/TryGhost/Ghost/commit/07d604100eb3df5c9b382fce6232928c96329448","https://github.com/TryGhost/Ghost","https://github.com/TryGhost/Ghost/releases/tag/v6.21.1"],"sourceUrl":"https://github.com/advisories/GHSA-ch52-px8q-f22j","license":"GitHub Advisory Database · CC-BY-4.0","key":"osv:GHSA-ch52-px8q-f22j","identifiers":["GHSA-ch52-px8q-f22j","BIT-ghost-2026-53945","CVE-2026-53945"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. 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