---
title: "CVE-2026-73842: OpenChoreo: cluster-gateway internal proxy performs no caller authentication and is not read-only — data-plane Secret disclosure and arbitrary Kubernetes mutation"
url: https://erroneo.us/security/cve/CVE-2026-73842/
description: "CVE-2026-73842 (github.com/openchoreo/openchoreo (Go)): OpenChoreo is a complete, open-source developer platform for Kubernetes. Prior to 1.0.3, 1.1.3, and…"
type: vulnerability-record
section: "Security Digest"
date_published: 2026-08-13
date_modified: 2026-09-04
publisher: erroneo.us
author: erroneo.us Security Desk
cve: "CVE-2026-73842"
kev: false
cvss: 9
epss: 0.00269
license: All rights reserved. Quote with attribution and a link.
---

# CVE-2026-73842: OpenChoreo: cluster-gateway internal proxy performs no caller authentication and is not read-only — data-plane Secret disclosure and arbitrary Kubernetes mutation

**Signal:** Critical, preconditions apply. Severe if exploited, but exploitation needs conditions that may not apply to you. (Computed from CISA KEV, EPSS and CVSS; not an editorial verdict.)

## Should you act?

- No confirmed exploitation. It is not in CISA’s KEV catalog and CISA’s SSVC assessment records no known exploitation. That can change quickly after a public write-up; re-check if you are affected.
- EPSS 0.3% , percentile 18: FIRST’s model estimates a 0.3% chance of exploitation activity in the next 30 days, higher than 18% of all scored CVEs (low). EPSS is a probability, not a verdict.
- Needs an account (low (any account)). Exposure depends on who can log in.
- Only applies if your dependency tree includes github.com/openchoreo/openchoreo (Go) < 1.0.3, fixed in 1.0.3 ; github.com/openchoreo/openchoreo (Go) >= 1.1.0, < 1.1.3, fixed in 1.1.3 ; github.com/openchoreo/openchoreo (Go) >= 1.2.0-rc.1, < 1.2.0-rc.2, fixed in 1.2.0 . Check your lockfile, including transitive dependencies.

## What it is

OpenChoreo is a complete, open-source developer platform for Kubernetes. Prior to 1.0.3, 1.1.3, and 1.2.0-rc.2, internal/cluster-gateway/server.go exposed /api/proxy/, /api/exec/, and /api/wirelogs/ on an internal listener without requiring a client certificate or token, allowing any network-reachable caller to read tenant Kubernetes Secrets, mutate workloads, and execute commands across connected data planes. This issue is fixed in versions 1.0.3, 1.1.3, and 1.2.0-rc.2.

## Affected packages

- Go `github.com/openchoreo/openchoreo` < 1.0.3 → fixed: 1.0.3
- Go `github.com/openchoreo/openchoreo` >= 1.1.0, < 1.1.3 → fixed: 1.1.3
- Go `github.com/openchoreo/openchoreo` >= 1.2.0-rc.1, < 1.2.0-rc.2 → fixed: 1.2.0

## Affected products (CVE record)

- openchoreo openchoreo: < 1.0.3, >= 1.1.0, < 1.1.3, >= 1.2.0-rc.1, < 1.2.0-rc.2

## Severity

- GitHub_M CVSS 3.1: 9 `CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H`
- GitHub CVSS 3.1: 9.0 `CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H`

## Exploitation

- CISA KEV: not listed (no confirmed in-the-wild exploitation known to CISA).
- CISA SSVC assessment: exploitation none , automatable no , technical impact total .
- FIRST EPSS (model of 2026-10-21): 0.27% probability of exploitation activity in the next 30 days; percentile 18.

## Sources

- [GitHub Advisory GHSA-rh53-xvx2-j327](https://github.com/advisories/GHSA-rh53-xvx2-j327)
- [CVE.org record CVE-2026-73842](https://www.cve.org/CVERecord?id=CVE-2026-73842)
- [NVD entry CVE-2026-73842](https://nvd.nist.gov/vuln/detail/CVE-2026-73842)
- [github.com](https://github.com/openchoreo/openchoreo/security/advisories/GHSA-rh53-xvx2-j327)
- [github.com](https://github.com/openchoreo/openchoreo/pull/4256)
- [github.com](https://github.com/openchoreo/openchoreo/pull/4258)
- [github.com](https://github.com/openchoreo/openchoreo/pull/4259)
- [github.com](https://github.com/openchoreo/openchoreo/commit/50fcae3f1753fd0ac3ae655a3fc080a761c49c04)
- [github.com](https://github.com/openchoreo/openchoreo/commit/93e6f10953cfc249af2222ddb6730d4b0a729129)
- [github.com](https://github.com/openchoreo/openchoreo/commit/e3da3c63dcf0895c693cb17ce142ef95e959b62a)
- [github.com](https://github.com/openchoreo/openchoreo/releases/tag/v1.0.3)
- [github.com](https://github.com/openchoreo/openchoreo/releases/tag/v1.1.3)
- [github.com](https://github.com/openchoreo/openchoreo/releases/tag/v1.2.0-rc.2)

---
Source page: https://erroneo.us/security/cve/CVE-2026-73842/ · Security Digest: https://erroneo.us/security/ · More: https://erroneo.us/llms.txt