{"id":"CVE-2026-55839","aliases":[],"url":"https://o3.security/vulnerability/CVE-2026-55839","summary":"Kestra is an open-source, event-driven orchestration platform. Prior to 1.3.24, Kestra's custom Markdown parser in ui/src/utils/markdown_plugins/link.ts allows a user with permission…","details":"Kestra is an open-source, event-driven orchestration platform. Prior to 1.3.24, Kestra's custom Markdown parser in ui/src/utils/markdown_plugins/link.ts allows a user with permission to create or update a Flow description to inject JavaScript event-handler attributes through the custom [[link]] syntax, causing stored cross-site scripting when another user opens the description or information panel in the Flow list. This issue is fixed in version 1.3.24.","published":"2026-08-18T16:17:53.710","modified":"2026-08-18T16:17:53.710","cvss":{"score":8.7,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N"},"epss":null,"cisaKev":null,"exploitsKnown":null,"affectedPackages":[],"fix":{"url":"https://github.com/kestra-io/kestra/commit/6c8e6d099ed172cbb6b003b7fb30b7bb1f8f710e","label":"kestra-io/kestra@6c8e6d0"},"references":[{"type":"WEB","url":"https://github.com/kestra-io/kestra/commit/6c8e6d099ed172cbb6b003b7fb30b7bb1f8f710e"},{"type":"WEB","url":"https://github.com/kestra-io/kestra/pull/16835"},{"type":"WEB","url":"https://github.com/kestra-io/kestra/releases/tag/v1.3.24"},{"type":"WEB","url":"https://github.com/kestra-io/kestra/security/advisories/GHSA-34pm-923j-7wf8"}],"provenance":{"sources":["OSV.dev","NVD","FIRST.org (EPSS)"],"lastVerified":"2026-08-18T16:17:53.710"}}