CVE-2026-55839 — Kestra: Stored XSS via custom Markdown [[link]] attribute injection
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 permi…
Published: 2026-08-18 · CVSS: 8.7 · CVSS 3.1
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.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7