# CVE-2026-73840 — openchoreo

> As of 2026-08-14, CVE-2026-73840 is a MEDIUM-severity vulnerability in openchoreo, CVSS v3.1 5.3, EPSS 0.2% (14.8th percentile). No Threadlinqs-tracked threat campaign has been attributed to CVE-2026-73840 as of 2026-08-14; the identifier is re-checked against the Threadlinqs threat corpus on every daily ingest.

**Last updated:** 2026-08-14

## What is CVE-2026-73840?

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.

The record classifies CVE-2026-73840 under weakness classes [CWE-287](https://intel.threadlinqs.com/cwe/CWE-287), [CWE-290](https://intel.threadlinqs.com/cwe/CWE-290), [CWE-345](https://intel.threadlinqs.com/cwe/CWE-345). Its CVSS v3 base vector states that the flaw is reachable remotely over the network, needs no prior authentication, needs no user interaction. 1 affected-product entry is recorded, across 1 vendor, listed below. The identifier was first published 53 days ago.

## Severity and exploitation probability

- **CVSS v3.1 base score:** 5.3 — MEDIUM (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L`)
- **EPSS (FIRST):** 0.2% probability of exploitation in the next 30 days, higher than 14.8% of all scored CVEs
- **CISA KEV:** Not listed in the CISA Known Exploited Vulnerabilities catalog
- **Threadlinqs priority:** 3.2/10 — a Threadlinqs composite of the CVSS base score, the EPSS percentile and public exploit availability
- **Published:** 2026-08-13, last modified 2026-08-14

## Is CVE-2026-73840 being exploited?

It currently carries a trending score of 33 in the Threadlinqs vulnerability feed.

## Affected products and versions

- [openchoreo](https://intel.threadlinqs.com/vendors/openchoreo): openchoreo

## How to fix CVE-2026-73840

No vendor patch reference has been recorded for CVE-2026-73840 in the tracked sources. Follow the references below for a fix, and treat the products listed above as exposed until the vendor states otherwise.

## Threat activity tracking CVE-2026-73840

No threat campaign in the Threadlinqs corpus currently references CVE-2026-73840, in its CVE list or as an indicator. The linkage is recomputed from the live corpus on every daily ingest, so this section fills in as soon as a tracked campaign cites the identifier.

## Sources

Enriched from CVE.org, NVD, FIRST EPSS. Last verified by Threadlinqs on 2026-08-15. This product uses the NVD API but is not endorsed or certified by the NVD.

**Vendor advisory and patch**

- [github.com](https://github.com/openchoreo/openchoreo/security/advisories/GHSA-c5f6-2rm9-2w8g)

**Other references**

- [github.com](https://github.com/openchoreo/openchoreo/pull/4239)
- [github.com (4252)](https://github.com/openchoreo/openchoreo/pull/4252)
- [github.com (4253)](https://github.com/openchoreo/openchoreo/pull/4253)
- [github.com (268efd9b762a3f4f72b55d9c1b13dfc55122127b)](https://github.com/openchoreo/openchoreo/commit/268efd9b762a3f4f72b55d9c1b13dfc55122127b)
- [github.com (8af4a3fc8725fc2d8a9de9611e77278a5c48f978)](https://github.com/openchoreo/openchoreo/commit/8af4a3fc8725fc2d8a9de9611e77278a5c48f978)

_Showing 6 of 10 recorded references._

Canonical: https://intel.threadlinqs.com/cve/CVE-2026-73840
Full detection coverage and IOCs for threats exploiting CVE-2026-73840 via the Threadlinqs MCP server (Purple tier): https://intel.threadlinqs.com/mcp