{"id":"CVE-2026-53946","revision":null,"records":[{"revision":"19a764fbc07044e582443ce4e00cd855","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-53946","aliases":[],"title":"Ghost: Mobiledoc image-size fetch SSRF","description":"Ghost is a Node.js content management system. From 6.19.4 until 6.21.1, when re-rendering posts, Ghost would refetch missing image dimensions by issuing an outbound HTTP request to the URL stored on an image card — without restricting that URL to trusted image hosts. An authenticated staff user able to create or edit posts could therefore point an image card at an attacker-chosen host and cause the Ghost server to request it on their behalf, including hosts on internal networks or cloud instance metadata endpoints that would not normally be reachable from the public internet. 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This vulnerability is fixed in 6.21.1.","state":0,"publishedAt":null,"modifiedAt":null,"affected":[],"metrics":[{"system":"EUVD CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N","score":5.4,"severity":null}],"references":["https://github.com/TryGhost/Ghost/security/advisories/GHSA-g366-23fw-ggp6"],"sourceUrl":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-39023","license":"ENISA EUVD · source terms and attribution apply","enrichment":{"sourceStatus":null,"weaknesses":[],"productCriteria":[],"sourceDates":{"datePublished":"Jun 24, 2026, 6:08:44 PM","dateUpdated":"Jun 25, 2026, 7:57:03 PM"},"relatedAdvisories":[],"note":"EUVD source date text has no stated timezone and is retained without inventing a UTC instant. Related bulletin membership is not an alias, common cause or applicability claim. A missing vector with a zero score is treated as unrated. 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An authenticated staff user able to create or edit posts could therefore point an image card at an attacker-chosen host and cause the Ghost server to request it on their behalf, including hosts on internal networks or cloud instance metadata endpoints that would not normally be reachable from the public internet. This vulnerability is fixed in 6.21.1.","state":0,"publishedAt":"2026-06-24T19:17:12.217+00:00","modifiedAt":"2026-10-25T22:10:00.15+00:00","affected":[],"metrics":[{"system":"CVSS 3.1 · security-advisories@github.com · Secondary","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N","score":5.4,"severity":"MEDIUM"}],"references":["https://github.com/TryGhost/Ghost/security/advisories/GHSA-g366-23fw-ggp6"],"sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-53946","license":"NIST NVD usage terms; underlying source attribution retained","enrichment":{"sourceStatus":"Deferred","weaknesses":["CWE-918"],"productCriteria":[],"sourceDates":{"published":"2026-06-24T19:17:12.217","lastModified":"2026-10-25T22:10:00.150"},"relatedAdvisories":[],"note":"NVD analysis and CPE criteria are source context, not proof that a package or your environment is affected. Complete affected data, logical configurations and SSVC are retained in the original JSON."},"key":"nvd:CVE-2026-53946","identifiers":["CVE-2026-53946"]},"retained":false,"historicalAffected":[]},{"revision":"bf6c993a1237416ba533adf564e591e3","observedAt":"2026-10-24T13:17:17.793+00:00","statement":{"source":"osv","id":"GHSA-g366-23fw-ggp6","aliases":["BIT-ghost-2026-53946","CVE-2026-53946"],"title":"Ghost: Mobiledoc image-size fetch SSRF","description":"### Impact\n\nWhen re-rendering posts, Ghost would refetch missing image dimensions by issuing an outbound HTTP request to the URL stored on an image card — without restricting that URL to trusted image hosts. An authenticated staff user able to create or edit posts could therefore point an image card at an attacker-chosen host and cause the Ghost server to request it on their behalf, including hosts on internal networks or cloud instance metadata endpoints that would not normally be reachable from the public internet.\n\n### Vulnerable versions\n\nThis vulnerability is present in Ghost from v6.19.3 up to v6.21.0.\n\n### Patches\n\nv6.21.1 contains a fix for this issue.\n\n### How to update\n\nFor self-hosters using Docker, find [Docker's official Ghost image here](https://hub.docker.com/_/ghost). 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### 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":"2026-08-04T21:25:21+00:00","modifiedAt":"2026-08-04T21:30:19.8523974+00:00","affected":[{"ecosystem":"npm","name":"ghost","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"6.19.4"},{"kind":"fixed","version":"6.21.2"}]}],"versions":[],"rawVersionEvidence":null}],"metrics":[{"system":"CVSS_V3","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/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-g366-23fw-ggp6","https://nvd.nist.gov/vuln/detail/CVE-2026-53946","https://github.com/TryGhost/Ghost/pull/26753","https://github.com/TryGhost/Ghost/commit/ba692df7f27162d0440d57487f16c530416a8eb2","https://github.com/TryGhost/Ghost","https://github.com/TryGhost/Ghost/releases/tag/v6.21.1"],"sourceUrl":"https://github.com/advisories/GHSA-g366-23fw-ggp6","license":"GitHub Advisory Database · CC-BY-4.0","key":"osv:GHSA-g366-23fw-ggp6","identifiers":["GHSA-g366-23fw-ggp6","BIT-ghost-2026-53946","CVE-2026-53946"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. 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