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CVE-2026-73840— OpenChoreo: Unauthenticated build/workflow trigger via git-provider confusion (webhook signature bypass)

Quick assessment

Affected
openchoreo openchoreo
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

OpenChoreo是openchoreo组织开源的一个面向 Kubernetes 的开发者平台。 OpenChoreo 1.0.3之前版本、1.1.3之前版本和1.2.0-rc.2之前版本存在安全漏洞，该漏洞源于internal/openchoreo-api/api/handlers/webhook_handler.go文件中的POST /api/v1alpha1/autobuild端点根据调用者控制的X-Event-Key选择Webhook提供程序，并接受没有HMAC-SHA256签名的Bitbuck

CVSS 5.3 · Medium EPSS 0.35% · P26

Affected Version Matrix 3

VendorProduct Version RangeStatus
openchoreo openchoreo < 1.0.3 affected
>= 1.1.0, < 1.1.3 affected
>= 1.2.0-rc.1, < 1.2.0-rc.2 affected
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I. Basic Information for CVE-2026-73840

Vulnerability Information
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Vulnerability Title
OpenChoreo: Unauthenticated build/workflow trigger via git-provider confusion (webhook signature bypass)
Source: CVE Program / CVE List V5
Vulnerability Description
OpenChoreo is a complete, open-source developer platform for Kubernetes. Prior to 1.0.3, 1.1.3, and 1.2.0-rc.2, the POST /api/v1alpha1/autobuild endpoint in internal/openchoreo-api/api/handlers/webhook_handler.go selected a webhook provider from caller-controlled X-Event-Key, accepted Bitbucket requests without HMAC-SHA256 in X-Hub-Signature or a configured bitbucket-secret, and allowed unauthenticated build triggers for components matched by repository URL and branch, including cross-provider triggers using attacker-supplied commit SHAs. This issue is fixed in versions 1.0.3, 1.1.3, and 1.2.0-rc.2.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
认证机制不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
OpenChoreo 授权问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
OpenChoreo是openchoreo组织开源的一个面向 Kubernetes 的开发者平台。 OpenChoreo 1.0.3之前版本、1.1.3之前版本和1.2.0-rc.2之前版本存在安全漏洞，该漏洞源于internal/openchoreo-api/api/handlers/webhook_handler.go文件中的POST /api/v1alpha1/autobuild端点根据调用者控制的X-Event-Key选择Webhook提供程序，并接受没有HMAC-SHA256签名的Bitbuck
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
openchoreo openchoreo < 1.0.3 -

II. Public POCs for CVE-2026-73840

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III. Intelligence Information for CVE-2026-73840

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Patches & Fixes for CVE-2026-73840 (3)

Vendor Advisories for CVE-2026-73840 (1)

Vendor Pages for CVE-2026-73840 (2)

Same Patch Batch · openchoreo · 2026-08-13 · 6 CVEs total

CVE-2026-73843 9.6 CRITICAL OpenChoreo: Unauthenticated access to data-plane operations via OpenChoreo cluster-gateway
CVE-2026-73842 9.0 CRITICAL OpenChoreo: cluster-gateway internal proxy performs no caller authentication and is not re
CVE-2026-73667 8.8 HIGH OpenChoreo: Authenticated OS command injection via OpenChoreo Workflow Plane templates ena
CVE-2026-73841 8.8 HIGH OpenChoreo: Cross-project command execution and wirelog view access via OpenChoreo opencho
CVE-2026-73666 8.2 HIGH OpenChoreo: Unauthenticated Backstage developer-portal API exposes OpenChoreo catalog data

IV. Related Vulnerabilities

Same product: openchoreo
Same vendor: openchoreo
Same weakness: CWE-287

V. Comments for CVE-2026-73840

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