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

Quick assessment

Affected
kestra-io kestra
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

kestra是Kestra开源的一个工作流自动化平台。 kestra 1.1.10及之前版本存在跨站脚本漏洞，该漏洞源于渲染用户提供的Markdown时未进行清理，可能导致跨站脚本攻击。

CVSS 7.3 · High EPSS 0.36% · P27
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I. Basic Information for CVE-2026-29082

Vulnerability Information
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Vulnerability Title
Kestra: Stored Cross-Site Scripting in Markdown File Preview
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
在Web页面生成时对输入的转义处理不恰当(跨站脚本)
Source: CVE Program / CVE List V5
Vulnerability Title
kestra 跨站脚本漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
kestra是Kestra开源的一个工作流自动化平台。 kestra 1.1.10及之前版本存在跨站脚本漏洞，该漏洞源于渲染用户提供的Markdown时未进行清理，可能导致跨站脚本攻击。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
kestra-io kestra <= 1.1.10 -

II. Public POCs for CVE-2026-29082

# POC Description Source Link Shenlong Link
AI-Generated POC Premium
Qwen3.6-35B-A3B · 9413 chars
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Vulnerability reproduction recording (real sandbox build + trigger, exclusive)
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Trigger conditions & impact
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Exploit chain & mitigation
POC zip download
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III. Intelligence Information for CVE-2026-29082

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Vendor Advisories for CVE-2026-29082 (1)

Vendor Pages for CVE-2026-29082 (1)

IV. Related Vulnerabilities

Same product: kestra
Same vendor: kestra-io
Same weakness: CWE-79

V. Comments for CVE-2026-29082

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