CVE-2026-73840Network attack vector

Unauthenticated build triggers via provider confusion

Published Aug 13, 2026 · Updated Aug 13, 2026

Authentication bypass in OpenChoreo before 1.0.3, 1.1.0 through 1.1.2, and 1.2.0-rc.1 allows remote attackers to trigger builds. The POST /api/v1alpha1/autobuild handler trusts the caller-controlled X-Event-Key provider choice, while its Bitbucket path accepts requests without a valid configured HMAC secret. Exposure requires network reachability, an auto-build component, and knowledge of its repository and branch; repeated triggers consume build resources, and auto-deploy runs attacker-influenced code.

CVSS severity5.3
Medium
EPSS probability0.24%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Authentication bypass in OpenChoreo before 1.0.3, 1.1.0 through 1.1.2, and 1.2.0-rc.1 allows remote attackers to trigger builds. The POST /api/v1alpha1/autobuild handler trusts the caller-controlled X-Event-Key provider choice, while its Bitbucket path accepts requests without a valid configured HMAC secret. Exposure requires network reachability, an auto-build component, and knowledge of its repository and branch; repeated triggers consume build resources, and auto-deploy runs attacker-influenced code.

The record

CVE
CVE-2026-73840
Published
Aug 13, 2026
Updated
Aug 13, 2026
Vendor
OpenChoreo
Product
OpenChoreo
Classifications
CWE-290, CWE-287, CWE-345, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 13, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 13, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 1.0.3
  2. Affected versionversion=>= 1.1.0, < 1.1.3
  3. Affected versionversion=>= 1.2.0-rc.1, < 1.2.0-rc.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

OpenChoreo · OpenChoreoversion=< 1.0.3; version=>= 1.1.0, < 1.1.3; version=>= 1.2.0-rc.1, < 1.2.0-rc.2

Published CVSS scores

5.3GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-290Authentication Bypass by Spoofing
CWE-287Improper Authentication
CWE-345Insufficient Verification of Data Authenticity
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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