CVE-2026-73840 (GCVE-0-2026-73840)
Vulnerability from cvelistv5 – Published: 2026-08-13 21:52 – Updated: 2026-08-14 16:26
VLAI
EPSS
VEX
Title
OpenChoreo: Unauthenticated build/workflow trigger via git-provider confusion (webhook signature bypass)
Summary
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.
Severity
5.3 (Medium)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-14 16:25 UTC
CWE
Assigner
References
10 references
| URL | Tags |
|---|---|
| https://github.com/openchoreo/openchoreo/security… | x_refsource_CONFIRM |
| https://github.com/openchoreo/openchoreo/pull/4239 | x_refsource_MISC |
| https://github.com/openchoreo/openchoreo/pull/4252 | x_refsource_MISC |
| https://github.com/openchoreo/openchoreo/pull/4253 | x_refsource_MISC |
| https://github.com/openchoreo/openchoreo/commit/2… | x_refsource_MISC |
| https://github.com/openchoreo/openchoreo/commit/8… | x_refsource_MISC |
| https://github.com/openchoreo/openchoreo/commit/f… | x_refsource_MISC |
| https://github.com/openchoreo/openchoreo/releases… | x_refsource_MISC |
| https://github.com/openchoreo/openchoreo/releases… | x_refsource_MISC |
| https://github.com/openchoreo/openchoreo/releases… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| openchoreo | openchoreo |
Affected:
< 1.0.3
Affected: >= 1.1.0, < 1.1.3 Affected: >= 1.2.0-rc.1, < 1.2.0-rc.2 |
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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