CVE-2026-33664
mediumpriority · track · 22EPSS 0.003 · 18 %ileEUUSEPSS · scored 2026-10-27
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.
cvss
Technical severity, 0–10. One row per scoring source.
base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 5–7.3
ssvc
A stakeholder decision — act, attend, or track — from exploitation and impact.
weaknesses
The CWE weakness classes this flaw belongs to.
affected products (2)
Products and version ranges known to be affected.
also known as (2)
Other names and identifiers for this entity.
sources
Which sources assert this record, and when.
references (4)
External citations — patches, advisories, analysis.
- https://github.com/kestra-io/kestra/releasesPatchcnnvd
- https://github.com/kestra-io/kestra/security/advisories/GHSA-v2mc-8q95-g7hpcnnvd
- https://github.com/kestra-io/kestra/security/advisories/GHSA-v2mc-8q95-g7hpenisa_euvd
- https://github.com/kestra-io/kestra/security/advisories/GHSA-v2mc-8q95-g7hpExploitMitigationVendor Advisorynvd
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