PT-2026-28508 · Kestra · Kestra

Dmitrii-Zalmanov · Published 2026-03-26 · Updated 2026-03-26 · CVE-2026-33664

Positive Technologies (AI Summary)

CVSS v3.1

7.3

High

Base vector

AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N

Name of the Vulnerable Software and Affected Versions Kestra versions up to and including 1.3.3

Description 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 issue affects different components and data sources, requiring minimal user interaction.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

XSS

Weakness Enumeration

CWE-79

Related Identifiers

CVE-2026-33664

GHSA-V2MC-8Q95-G7HP

Affected Products

Kestra

References · 5

• 🔥 https://github.com/kestra-io/kestra/security/advisories/GHSA-v2mc-8q95-g7hp · Exploit
• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/33xxx/CVE-2026-33664.json · Exploit
• https://osv.dev/vulnerability/CVE-2026-33664 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-33664 · Security Note
• https://twitter.com/CVEnew/status/2037280517100539915 · Twitter Post