CVE-2026-29082

Kestra: Stored Cross-Site Scripting in Markdown File Preview

MEDIUM
5.4
CVSS Score
Published: March 6, 2026 at 04:33 PM UTC
Updated: June 17, 2026 at 10:29 AM UTC
2 products affected across 2 vendorsKestraKestra

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Severity
MEDIUM5.4
Exploit prediction
EPSS 0.3%
SSVC
PoC

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

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

References (2)

x_refsource_CONFIRMExploitVendor Advisory
Source: cverecord
https://github.com/kestra-io/kestra/security/advisories/GHSA-r36c-83hm-pc8j
x_refsource_MISCProductRelease Notes
Source: cverecord
https://github.com/kestra-io/kestra/releases/tag/v1.0.30

SSVC — Action Prioritization

SSVCPoCNot automatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

Attack Vector
NETWORK
Complexity
LOW
Privileges
LOW
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality
LOW
Integrity
LOW
Availability
NONE
Vector?

Quick Info

StatusANALYZED
CWE
CWE-79

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