CVE-2026-29082: Kestra: Stored Cross-Site Scripting in Markdown File Preview

Severity: medium (CVSS 5.4 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2026-03-06 · updated 2026-06-17
Weakness: CWE-79

Description

Kestra is an event-driven orchestration platform. In versions from 1.1.10 and prior, Kestra’s execution-file preview renders user-supplied Markdown (.md) with markdown-it instantiated as html:true and injects the resulting HTML with Vue’s v-html without sanitisation. At time of publication, there are no publicly available patches.

Affected products

kestra-io kestra: through 1.1.10

References

https://github.com/kestra-io/kestra/releases/tag/v1.0.30
https://github.com/kestra-io/kestra/security/advisories/GHSA-r36c-83hm-pc8j
https://github.com/kestra-io/kestra/security/advisories/GHSA-r36c-83hm-pc8j

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