{"action":"Upgrade @sveltia/cms to 0.167.3 or later.","affected":[{"fixed":"0.167.3","introduced":"0"}],"component":"@sveltia/cms","cve_ids":[],"ecosystem":"npm","exploited":false,"fixed_versions":["0.167.3"],"ghsa_id":"GHSA-h5jc-78hr-3pc9","id":"tcs_01M5KFT833ZYH1FGBGHKYCHRFC","modified_at":"2026-09-10T03:50:49.684005183Z","published_at":"2026-06-19T21:42:20Z","references":["https://osv.dev/vulnerability/GHSA-h5jc-78hr-3pc9","https://github.com/sveltia/sveltia-cms/security/advisories/GHSA-h5jc-78hr-3pc9","https://github.com/sveltia/sveltia-cms/commit/8c46294eadf52a8ac48740ccb5054b99d65cff1b","https://github.com/sveltia/sveltia-cms","https://github.com/sveltia/sveltia-cms/releases/tag/v0.167.3"],"severity":{"label":"low"},"sources":[{"source":"osv","source_id":"GHSA-h5jc-78hr-3pc9","url":"https://osv.dev/vulnerability/GHSA-h5jc-78hr-3pc9"}],"summary":"Sveltia CMS: Stored XSS in Markdown/RichText preview via unsandboxed same-origin iframe"}