---
id: GHSA-h58c-xccx-75m3
title: >-
  Coder: Stored HTML injection via unescaped ApplicationName and LogoURL
  appearance settings
summary: >-
  Coder: Stored HTML injection via unescaped ApplicationName and LogoURL
  appearance settings
severity: low
cvss: 3.4
cwe:
  - CWE-74
vendor: coder
product: github.com/coder/coder/v2
ecosystem: go
affected:
  - 'github.com/coder/coder/v2 >= 2.34.0, < 2.34.2'
  - 'github.com/coder/coder/v2 >= 2.33.0, < 2.33.8'
  - 'github.com/coder/coder/v2 >= 2.30.0, < 2.32.7'
  - github.com/coder/coder/v2 < 2.29.17
patched:
  - github.com/coder/coder/v2 2.34.2
  - github.com/coder/coder/v2 2.33.8
  - github.com/coder/coder/v2 2.32.7
  - github.com/coder/coder/v2 2.29.17
published: '2026-08-20'
updated: '2026-08-20'
source: GHSA
sourceUrl: 'https://github.com/advisories/GHSA-h58c-xccx-75m3'
references:
  - url: 'https://github.com/coder/coder/security/advisories/GHSA-h58c-xccx-75m3'
  - url: 'https://github.com/coder/coder/pull/25804'
  - url: >-
      https://github.com/coder/coder/commit/ec19bc41d80568c0eb9f74b526e8cc8ffbe3be9a
  - url: 'https://github.com/coder/coder/releases/tag/v2.29.17'
  - url: 'https://github.com/coder/coder/releases/tag/v2.32.7'
  - url: 'https://github.com/coder/coder/releases/tag/v2.33.8'
  - url: 'https://github.com/coder/coder/releases/tag/v2.34.2'
  - url: 'https://github.com/advisories/GHSA-h58c-xccx-75m3'
tags:
  - ghsa
  - go
ingestedAt: '2026-08-20T18:59:55.260Z'
---

## Overview

### Summary

The `ApplicationName` and `LogoURL` appearance settings were rendered into HTML output without sufficient escaping which let a highly privileged Owner-role user inject HTML into the Coder dashboard and SMTP notification emails.

> **Note:** Exploitation requires the `Owner` role which already holds full administrative control of the deployment so practical impact is limited.

### Impact

An Owner-role user could store HTML markup in the `ApplicationName` or `LogoURL` appearance settings that later rendered in the dashboard and in SMTP notification emails which results in stored HTML injection against other users of the deployment. Exploitation requires the highly privileged `Owner` role.

### Patches

The fix escapes the `ApplicationName` and `LogoURL` appearance values in HTML output before rendering.

The fix was backported to all supported release lines:

| Release line | Patched version |
|---|---|
| 2.34 | [v2.34.2](https://github.com/coder/coder/releases/tag/v2.34.2) |
| 2.33 | [v2.33.8](https://github.com/coder/coder/releases/tag/v2.33.8) |
| 2.32 | [v2.32.7](https://github.com/coder/coder/releases/tag/v2.32.7) |
| 2.29 (ESR) | [v2.29.17](https://github.com/coder/coder/releases/tag/v2.29.17) |

### Workarounds

Restrict the `Owner` role to trusted administrators.

### References

- Fix: #25804

### Credits

We'd like to thank Anthropic's Security Team (ANT-2026-22453) for independently disclosing this issue!

## Affected packages

- `github.com/coder/coder/v2 >= 2.34.0, < 2.34.2`
- `github.com/coder/coder/v2 >= 2.33.0, < 2.33.8`
- `github.com/coder/coder/v2 >= 2.30.0, < 2.32.7`
- `github.com/coder/coder/v2 < 2.29.17`

## Remediation

Upgrade to a patched release:

- `github.com/coder/coder/v2 2.34.2`
- `github.com/coder/coder/v2 2.33.8`
- `github.com/coder/coder/v2 2.32.7`
- `github.com/coder/coder/v2 2.29.17`