CVE-2026-73840
OpenChoreo: Unauthenticated build/workflow trigger via git-provider confusion (webhook signature bypass)
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.
INFO
Published Date :
Aug. 13, 2026, 10:17 p.m.
Last Modified :
Aug. 13, 2026, 10:17 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
Affected Products
The following products are affected by CVE-2026-73840
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
No affected product recoded yet
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | MEDIUM | [email protected] |
Solution
- Update OpenChoreo to version 1.0.3 or later.
- Apply security patches for the internal API.
- Ensure webhook providers are properly authenticated.
- Validate HMAC-SHA256 signatures for Bitbucket requests.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-73840.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-73840 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-73840
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-73840 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-73840 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
New CVE Received by [email protected]
Aug. 13, 2026
Action Type Old Value New Value Added Affected [{'vendor': 'openchoreo', 'product': 'openchoreo', 'versions': [{'status': 'affected', 'version': '< 1.0.3'}, {'status': 'affected', 'version': '>= 1.1.0, < 1.1.3'}, {'status': 'affected', 'version': '>= 1.2.0-rc.1, < 1.2.0-rc.2'}]}] Added 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. Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L Added CWE CWE-287 Added CWE CWE-345 Added CWE CWE-290 Added Reference https://github.com/openchoreo/openchoreo/commit/268efd9b762a3f4f72b55d9c1b13dfc55122127b Added Reference https://github.com/openchoreo/openchoreo/commit/8af4a3fc8725fc2d8a9de9611e77278a5c48f978 Added Reference https://github.com/openchoreo/openchoreo/commit/f540553db7143141b73bb37fae02102e6f082a34 Added Reference https://github.com/openchoreo/openchoreo/pull/4239 Added Reference https://github.com/openchoreo/openchoreo/pull/4252 Added Reference https://github.com/openchoreo/openchoreo/pull/4253 Added Reference https://github.com/openchoreo/openchoreo/releases/tag/v1.0.3 Added Reference https://github.com/openchoreo/openchoreo/releases/tag/v1.1.3 Added Reference https://github.com/openchoreo/openchoreo/releases/tag/v1.2.0-rc.2 Added Reference https://github.com/openchoreo/openchoreo/security/advisories/GHSA-c5f6-2rm9-2w8g