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CVE-2026-73247— Kestra: SSRF via Pebble http() function allows unauthenticated access to internal services & cloud metadata

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组织开源的一个工作流自动化平台。 Kestra 2.0.0之前版本存在服务端请求伪造漏洞，该漏洞源于用户控制的http() uri参数未限制访问私有、回环或链路本地目标，可能导致服务端请求伪造攻击，未经身份验证的攻击者可导入并执行访问内部服务或云元数据的流程。

CVSS 8.6 · High EPSS 0.41% · P33

Possible ATT&CK Techniques 1 AI

T1592 · Gather Victim Host Information

Affected Version Matrix 1

VendorProduct Version RangeStatus
kestra-io kestra < 2.0.0 affected
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I. Basic Information for CVE-2026-73247

Vulnerability Information
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Vulnerability Title
Kestra: SSRF via Pebble http() function allows unauthenticated access to internal services & cloud metadata
Source: CVE Program / CVE List V5
Vulnerability Description
Kestra is an open-source, event-driven orchestration platform. Prior to 2.0.0, Kestra's core/src/main/java/io/kestra/core/runners/pebble/functions/HttpFunction.java passes the user-controlled http() uri argument to URI.create() and the server-side HTTP client without restricting private, loopback, or link-local destinations, allowing an unauthenticated attacker to import and execute a flow that accesses internal services or cloud metadata.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
服务端请求伪造(SSRF)
Source: CVE Program / CVE List V5
Vulnerability Title
Kestra 服务端请求伪造漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Kestra是Kestra组织开源的一个工作流自动化平台。 Kestra 2.0.0之前版本存在服务端请求伪造漏洞，该漏洞源于用户控制的http() uri参数未限制访问私有、回环或链路本地目标，可能导致服务端请求伪造攻击，未经身份验证的攻击者可导入并执行访问内部服务或云元数据的流程。
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 < 2.0.0 -

II. Public POCs for CVE-2026-73247

# POC Description Source Link Shenlong Link
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Qwen3.6-35B-A3B · 7531 chars
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III. Intelligence Information for CVE-2026-73247

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Vendor Advisories for CVE-2026-73247 (1)

Same Patch Batch · kestra-io · 2026-08-11 · 3 CVEs total

CVE-2026-73246 7.5 HIGH Kestra: Unauthenticated management `/worker` endpoint exposes live task configuration and
CVE-2026-73245 6.5 MEDIUM Kestra: Unauthenticated management/actuator endpoints exposed on port 8081 (/env, /loggers

IV. Related Vulnerabilities

Same product: kestra
Same vendor: kestra-io
Same weakness: CWE-918

V. Comments for CVE-2026-73247

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