{"id":"CVE-2026-33664","summary":"Kestra Vulnerable to Stored Cross-Site Scripting via Flow YAML Fields","details":"Kestra is an open-source, event-driven orchestration platform Versions up to and including 1.3.3 render user-supplied flow YAML metadata fields — description, inputs[].displayName, inputs[].description — through the Markdown.vue component instantiated with html: true. The resulting HTML is injected into the DOM via Vue's v-html without any sanitization. This allows a flow author to embed arbitrary JavaScript that executes in the browser of any user who views or interacts with the flow. This is distinct from GHSA-r36c-83hm-pc8j / CVE-2026-29082, which covers only FilePreview.vue rendering .md files from execution outputs. The present finding affects different components, different data sources, and requires significantly less user interaction (zero-click for input.displayName). As of time of publication, it is unclear if a patch is available.","aliases":["GHSA-v2mc-8q95-g7hp"],"modified":"2026-04-10T05:42:53.058901Z","published":"2026-03-26T21:13:12.467Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/33xxx/CVE-2026-33664.json","cna_assigner":"GitHub_M","cwe_ids":["CWE-79"]},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/33xxx/CVE-2026-33664.json"},{"type":"ADVISORY","url":"https://github.com/kestra-io/kestra/security/advisories/GHSA-v2mc-8q95-g7hp"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-33664"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/kestra-io/kestra","events":[{"introduced":"0"},{"last_affected":"63603539415a4b29f65a75cec8e733f6424005ac"}],"database_specific":{"versions":[{"introduced":"0"},{"last_affected":"1.3.3"}]}}],"versions":["v0.0.1234","v0.19.0","v0.7.0","v0.7.1","v0.8.0","v0.8.1","v0.9.0","v0.9.1","v1.3.0","v1.3.0-rc0","v1.3.0-rc1","v1.3.1","v1.3.2","v1.3.3"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-33664.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N"}]}