---
title: "CVE-2026-111927: Coder - Broken Access Control"
description: "Coder before 2.29.20, 2.33.0 before 2.33.12, 2.34.0 before 2.34.8, and 2.35.0 before 2.35.4 contains an improper hostname validation flaw in GetWorkspaceProxyByHostname, letting attackers owning a prefix domain capture and replay API keys to access victim's workspace apps, exploit requires victim authentication and interaction."
url: https://panop.io/threat-heartbeat/CVE-2026-111927/
---

# CVE-2026-111927 Coder - Broken Access Control

Coder before 2.29.20, 2.33.0 before 2.33.12, 2.34.0 before 2.34.8, and 2.35.0 before 2.35.4 contains an improper hostname validation flaw in GetWorkspaceProxyByHostname, letting attackers owning a prefix domain capture and replay API keys to access victim's workspace apps, exploit requires victim authentication and interaction.

CVSS base score 7.7 /10

High

CISA KEV

Not listed

Public exploit

None known

Authentication

Required

EPSS

0.21% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-111927)

## Details

Type

Broken Access Control

Impact

Broken Access Control

CVSS vector

CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:N

Published

17 October 2026

Updated

19 October 2026

Weakness

[CWE-522](https://cwe.mitre.org/data/definitions/522.html)

## Vendor fix

Update to versions 2.29.20, 2.33.12, 2.34.8, 2.35.4 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-111927](https://nvd.nist.gov/vuln/detail/CVE-2026-111927)
- [https://github.com/coder/coder/security/advisories/GHSA-h58h-qvv5-xvwg](https://github.com/coder/coder/security/advisories/GHSA-h58h-qvv5-xvwg)
- [https://www.vulncheck.com/advisories/coder-before-2.35.4-credential-theft-via-workspace-proxy-hostname-prefix-match](https://www.vulncheck.com/advisories/coder-before-2.35.4-credential-theft-via-workspace-proxy-hostname-prefix-match)

[← All CVEs](https://panop.io/threat-heartbeat/)

## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

Panop answers these inside your environment, for this CVE and every other finding.

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