TI-2026-23227 Aliases CVE-2026-29082

Kestra: Stored Cross-Site Scripting in Markdown File Preview

HIGH 67CWE-79Published 2026-03-06 · Updated 2026-03-09

Key facts

Attack vector: Network
Privileges required: Low
User interaction: Required
Attack complexity: Low
Impact type: Cross-site scripting
Confidentiality · integrity · availability: High · High · None
Fix status: No fix listed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-79.

Summary

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV

EPSS 0.00271 19th percentileScored 2026-11-07

Public exploit Yes 1 exploit referenceTagged by NVD

Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: Poc
Automatable: No
Technical impact: Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
Kestra	kestra	up to 1.1.10	—	No fix listed	CNA

kestra VendorKestra Affected up to 1.1.10 Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:kestra:kestra::::::::	up to 1.1.10	Vulnerable	Kestra

cpe:2.3:a:kestra:kestra:*:*:*:*:*:*:*:* Versions up to 1.1.10 Vulnerable ·Kestra

Remediation

No fixed version listed by the sources yet.

Timeline

2026-10-02 Threatist record created from CVE-2026-29082

References

Exploit 1

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

Other 1

https://github.com/kestra-io/kestra/releases/tag/v1.0.30

TI-2026-36769 Kestra: Unauthenticated Remote Code Execution via Authentication Bypass in `AuthenticationFilter` KEVCVSS 3.1CRITICAL 10.0
TI-2026-38637 Kestra: Unauthenticated RCE via /configs path-suffix auth-filter bypass CVSS 3.1CRITICAL 10.0
TI-2026-28138 Kestra v1.3.3 and before is vulnerable to SQL Injection. CVSS 3.1CRITICAL 9.8
TI-2026-26858 Kestra: Remote Code Execution via SQL Injection CVSS 3.1CRITICAL 10.0
TI-2026-39775 Kestra BasicAuth Password Stored as SHA-512 Enables Offline Brute-Force Attack CVSS 3.1HIGH 8.7
TI-2026-36817 Information disclosure in kestra CVSS 3.1HIGH 7.7

See all 9 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences