{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-55890","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","state":"PUBLISHED","assignerShortName":"GitHub_M","dateReserved":"2026-06-17T16:59:42.760Z","datePublished":"2026-07-10T16:17:14.238Z","dateUpdated":"2026-07-10T18:39:18.467Z"},"containers":{"cna":{"title":"Grav: Stored CSS injection via Markdown image ?style=… reaches MediaObjectTrait::style()","problemTypes":[{"descriptions":[{"cweId":"CWE-79","lang":"en","description":"CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')","type":"CWE"}]}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":4.8,"baseSeverity":"MEDIUM","confidentialityImpact":"LOW","integrityImpact":"LOW","privilegesRequired":"HIGH","scope":"CHANGED","userInteraction":"REQUIRED","vectorString":"CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N","version":"3.1"}}],"references":[{"name":"https://github.com/getgrav/grav/security/advisories/GHSA-pmf8-g7c8-7v54","tags":["x_refsource_CONFIRM"],"url":"https://github.com/getgrav/grav/security/advisories/GHSA-pmf8-g7c8-7v54"},{"name":"https://github.com/getgrav/grav/commit/24fd6cbc438e12310b126d1176e7d7601203a6f2","tags":["x_refsource_MISC"],"url":"https://github.com/getgrav/grav/commit/24fd6cbc438e12310b126d1176e7d7601203a6f2"},{"name":"https://github.com/getgrav/grav/releases/tag/2.0.0-rc.9","tags":["x_refsource_MISC"],"url":"https://github.com/getgrav/grav/releases/tag/2.0.0-rc.9"}],"affected":[{"vendor":"getgrav","product":"grav","versions":[{"version":"< 2.0.0-rc.9","status":"affected"}]}],"providerMetadata":{"orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","shortName":"GitHub_M","dateUpdated":"2026-07-10T16:17:14.238Z"},"descriptions":[{"lang":"en","value":"Grav is a file-based Web platform. Prior to 2.0.0-rc.9, Grav's incomplete fix for stored XSS through the Markdown media attribute action (CVE-2026-42841) leaves the sibling MediaObjectTrait::style method reachable through the same Markdown excerpt-action pipeline, allowing an editor to save Markdown image style parameters that are written into the rendered img style attribute without sanitization. This issue is fixed in version 2.0.0-rc.9."}],"source":{"advisory":"GHSA-pmf8-g7c8-7v54","discovery":"UNKNOWN"}},"adp":[{"references":[{"url":"https://github.com/getgrav/grav/security/advisories/GHSA-pmf8-g7c8-7v54","tags":["exploit"]}],"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-07-10T18:39:15.530035Z","id":"CVE-2026-55890","options":[{"Exploitation":"poc"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-07-10T18:39:18.467Z"}}]}}