{"id":"CVE-2026-55890","summary":"Grav: Stored CSS injection via Markdown image ?style=… reaches MediaObjectTrait::style()","details":"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.","aliases":["GHSA-pmf8-g7c8-7v54"],"modified":"2026-08-12T03:51:19.396831184Z","published":"2026-07-10T16:17:14.238Z","database_specific":{"cwe_ids":["CWE-79"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/55xxx/CVE-2026-55890.json","cna_assigner":"GitHub_M"},"references":[{"type":"WEB","url":"https://github.com/getgrav/grav/releases/tag/2.0.0-rc.9"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/55xxx/CVE-2026-55890.json"},{"type":"ADVISORY","url":"https://github.com/getgrav/grav/security/advisories/GHSA-pmf8-g7c8-7v54"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-55890"},{"type":"FIX","url":"https://github.com/getgrav/grav/commit/24fd6cbc438e12310b126d1176e7d7601203a6f2"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/getgrav/grav","events":[{"introduced":"0"},{"fixed":"24fd6cbc438e12310b126d1176e7d7601203a6f2"},{"fixed":"e03d29aa0d3ece16d73c1ffccfa78df8bf5f28b8"}],"database_specific":{"source":["AFFECTED_FIELD","REFERENCES"],"extracted_events":[{"introduced":"0"},{"fixed":"2.0.0-rc.9"}]}}],"versions":["2.0.0-rc.8","2.0.0-rc.7","2.0.0-rc.6","2.0.0-rc.5","2.0.0-rc.4","2.0.0-rc.3","2.0.0-rc.2","2.0.0-rc.1","2.0.0-beta.4","2.0.0-beta.3","2.0.0-beta.2","2.0.0-beta.1","1.8.0-beta.29","1.8.0-beta.28","1.8.0-beta.27","1.8.0-beta.26","1.8.0-beta.25","1.8.0-beta.24","1.8.0-beta.23","1.8.0-beta.22","1.8.0-beta.21","1.8.0-beta.20","1.8.0-beta.19","1.8.0-beta.18","1.8.0-beta.17","1.8.0-beta.16","1.8.0-beta.15","1.8.0-beta.14","1.8.0-beta.13","1.8.0-beta.12","1.8.0-beta.11","1.8.0-beta.10","1.8.0-beta.9","1.8.0-beta.8","1.8.0-beta.7","1.8.0-beta.6","1.8.0-beta.5","1.8.0-beta.4","1.8.0-beta.3","1.8.0-beta.2","1.8.0-beta.1","1.7.0-rc.20","1.7.0-rc.19","1.7.0-rc.18","1.7.0-rc.17","1.7.0-rc.15","1.7.0-rc.14","1.7.0-rc.13","1.7.0-rc.12","1.7.0-rc.10","1.7.0-rc.9","1.7.0-rc.8","1.7.0-rc.7","1.7.0-rc.6","1.7.0-rc.5","1.7.0-rc.4","1.7.0-rc.3","1.7.0-rc.2","1.7.0-rc.1","1.7.0-beta.10","1.7.0-beta.9","1.7.0-beta.8","1.7.0-beta.7","1.7.0-beta.6","1.7.0-beta.5","1.7.0-beta.4","1.7.0-beta.3","1.7.0-beta.2","1.7.0-beta.1","1.6.0-rc.4","1.6.0-rc.3","1.6.0-rc.2","1.6.0-rc.1","1.6.0-beta.8","1.6.0-beta.7","1.6.0-beta.6","1.6.0-beta.5","1.6.0-beta.2","1.6.0-beta.1","1.5.0-rc.1","1.5.0-beta.2","1.5.0-beta.1","1.3.0-rc.5","1.3.0-rc.4","1.3.0-rc.3","1.3.0-rc.1","1.2.0-rc.3","1.2.0-rc.2","1.2.0-rc.1","1.1.9-rc.3","1.1.9-rc.2","1.1.9-rc.1","1.1.0-rc.3","1.1.0-rc.2","1.1.0-rc.1","1.1.0-beta.5","1.1.0-beta.4","1.1.0-beta.3","1.1.0-beta.2","1.1.0-beta.1","0.9.19","0.9.18","0.9.17","0.9.16","0.9.15","0.9.14","0.9.13","0.9.12","0.9.11","0.9.10","0.9.9","0.9.8","0.9.7","0.9.6","0.9.5","0.9.4","0.9.3","0.9.2","0.9.0","0.8.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-55890.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N"}]}