CVE-2026-73840OpenChoreo: Unauthenticated build/workflow trigger via git-provider confusion (webhook signature bypass)
- 5.3MediumCVSS base score
- 0.35%Exploitation in 30 daysEPSS · top 71% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
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.
Timeline
ID reserved
By GitHub_M
Published
- 1 day later
· 1 day later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| GitHub_MCNA (assigner) | 3.1 | Medium5.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L |
| NVDNVD · Deferred | 3.1 | Medium5.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L |
- EPSS (exploitation in 30 days)
- 0.35% · top 71% of all CVEs (12 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: yes · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.3.
Affected products
- affected < 1.0.3
- affected >= 1.1.0, < 1.1.3
- affected >= 1.2.0-rc.1, < 1.2.0-rc.2
Affected packages
From reviewed advisories of the GitHub Advisory Database.
- Gogithub.com/openchoreo/openchoreoGHSA-c5f6-2rm9-2w8g (opens in a new tab)
References
References10
- https://github.com/openchoreo/openchoreo/security/advisories/GHSA-c5f6-2rm9-2w8g (opens in a new tab)x_refsource_CONFIRM
- https://github.com/openchoreo/openchoreo/pull/4239 (opens in a new tab)x_refsource_MISC
- https://github.com/openchoreo/openchoreo/pull/4252 (opens in a new tab)x_refsource_MISC
- https://github.com/openchoreo/openchoreo/pull/4253 (opens in a new tab)x_refsource_MISC
- https://github.com/openchoreo/openchoreo/commit/268efd9b762a3f4f72b55d9c1b13dfc55122127b (opens in a new tab)x_refsource_MISC
- https://github.com/openchoreo/openchoreo/commit/8af4a3fc8725fc2d8a9de9611e77278a5c48f978 (opens in a new tab)x_refsource_MISC
- https://github.com/openchoreo/openchoreo/commit/f540553db7143141b73bb37fae02102e6f082a34 (opens in a new tab)x_refsource_MISC
- https://github.com/openchoreo/openchoreo/releases/tag/v1.0.3 (opens in a new tab)x_refsource_MISC
- https://github.com/openchoreo/openchoreo/releases/tag/v1.1.3 (opens in a new tab)x_refsource_MISC
- https://github.com/openchoreo/openchoreo/releases/tag/v1.2.0-rc.2 (opens in a new tab)x_refsource_MISC
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2026-58546 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisory GHSA-c5f6-2rm9-2w8g (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2026-73840)Record last updated .