high8.7
CVE-2026-55839
Kestra vulnerable to stored XSS via custom Markdown [[link]] attribute injection
Impact
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.
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| maven | io.kestra:kestra | < 1.3.24 | 1.3.24 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://github.com/advisories/GHSA-34pm-923j-7wf8
- https://github.com/kestra-io/kestra/security/advisories/GHSA-34pm-923j-7wf8
- https://github.com/kestra-io/kestra/commit/6c8e6d099ed172cbb6b003b7fb30b7bb1f8f710e
- https://github.com/kestra-io/kestra/releases/tag/v1.3.24
- https://github.com/kestra-io/kestra/pull/16835