# CVE-2026-55432: Coder missing authorization in CreateSubAgent RPC port sharing

Source: https://junglewise.ai/threats/cve-2026-55432-coder-missing-authorization-in-createsubagent-rpc-port-sharing  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-07-08. Updated: 2026-07-08  
License: CC BY 4.0 with a link back

CVE-2026-55432 · Severity: medium · CVSS 5.4 · Published 2026-07-08

Coder is a platform used by organizations to manage and deploy remote development environments. A security flaw was identified where workspace owners could bypass administrative restrictions on how development tools and ports are shared within the network. This could allow a user to expose internal applications or services more broadly than intended by the organization's security policy.

Technologies: [Coder](https://junglewise.ai/threats/technologies/coder), [github.com/coder/coder (Go)](https://junglewise.ai/threats/technologies/github-com-coder-coder), [github.com/coder/coder/v2 (Go)](https://junglewise.ai/threats/technologies/github-com-coder-coder-v2). Vendors: [Coder](https://junglewise.ai/threats/vendors/coder), [Go](https://junglewise.ai/threats/vendors/go).

## Quick answers

**Is CVE-2026-55432 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-55432 being exploited in the wild.

**How severe is CVE-2026-55432?** Medium severity, with a CVSS score of 5.4, published 8 July 2026.

**Which products and versions are affected?** Coder < 2.29.17, >= 2.30.0 < 2.32.7, >= 2.33.0 < 2.33.8, >= 2.34.0 < 2.34.2; github.com/coder/coder (Go) SEMVER:introduced=0; github.com/coder/coder/v2 (Go) SEMVER:introduced=0,fixed=2.29.17,introduced=2.30.0,fixed=2.32.7,introduced=2.33.0,fixed=2.33.8,introduced=2.34.0,fixed=2.34.2, SEMVER:introduced=2.34.0,fixed=2.34.2.

**Is there a fix for CVE-2026-55432?** Yes. github.com/coder/coder/v2 (Go): upgrade to 2.34.2 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-55432 attacked?** It is attacked over the network, in a software library.

**Am I affected by CVE-2026-55432?** Check whether you run Coder, github.com/coder/coder (Go) or github.com/coder/coder/v2 (Go) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix

- github.com/coder/coder/v2 (Go): upgrade to 2.34.2 or later

  ```sh
  go get github.com/coder/coder/v2@v2.34.2
  ```


## Technical details

A missing authorization check (CWE-862) exists in Coder's `CreateSubAgent` RPC. The component failed to validate a requested application sharing level against the template's `MaxPortSharingLevel` before persisting workspace applications. An attacker with the ability to register sub-agent apps in a workspace they control can exploit this to bypass administrative port-sharing restrictions. The vulnerability is addressed in versions 2.29.17, 2.32.7, 2.33.8, and 2.34.2 by clamping the sub-agent app sharing level to the template's maximum. A temporary workaround involves disabling wildcard app hostnames via the `CODER_WILDCARD_ACCESS_URL` setting.

## Affected products

- Coder Coder < 2.29.17, >= 2.30.0 < 2.32.7, >= 2.33.0 < 2.33.8, >= 2.34.0 < 2.34.2

## Identifiers

- CVE-2026-55432
- GHSA-x9qq-2qh5-8rxf
- GO-2026-5926

## Timeline

- 2026-06-04: patched: Fix merged into main branch
- 2026-06-11: advisory: Security releases published for multiple versions
- 2026-07-08: disclosed: NVD publication date

## References

- [https://github.com/coder/coder/pull/26061](https://github.com/coder/coder/pull/26061)
- [https://github.com/coder/coder/releases/tag/v2.29.17](https://github.com/coder/coder/releases/tag/v2.29.17)
- [https://github.com/coder/coder/releases/tag/v2.32.7](https://github.com/coder/coder/releases/tag/v2.32.7)
- [https://github.com/coder/coder/releases/tag/v2.33.8](https://github.com/coder/coder/releases/tag/v2.33.8)
- [https://github.com/coder/coder/releases/tag/v2.34.2](https://github.com/coder/coder/releases/tag/v2.34.2)
- [https://github.com/coder/coder/security/advisories/GHSA-x9qq-2qh5-8rxf](https://github.com/coder/coder/security/advisories/GHSA-x9qq-2qh5-8rxf)

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