{"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","slug":"GHSA-h58c-xccx-75m3","body":"## Overview\n\n### Summary\n\nThe `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.\n\n> **Note:** Exploitation requires the `Owner` role which already holds full administrative control of the deployment so practical impact is limited.\n\n### Impact\n\nAn 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.\n\n### Patches\n\nThe fix escapes the `ApplicationName` and `LogoURL` appearance values in HTML output before rendering.\n\nThe fix was backported to all supported release lines:\n\n| Release line | Patched version |\n|---|---|\n| 2.34 | [v2.34.2](https://github.com/coder/coder/releases/tag/v2.34.2) |\n| 2.33 | [v2.33.8](https://github.com/coder/coder/releases/tag/v2.33.8) |\n| 2.32 | [v2.32.7](https://github.com/coder/coder/releases/tag/v2.32.7) |\n| 2.29 (ESR) | [v2.29.17](https://github.com/coder/coder/releases/tag/v2.29.17) |\n\n### Workarounds\n\nRestrict the `Owner` role to trusted administrators.\n\n### References\n\n- Fix: #25804\n\n### Credits\n\nWe'd like to thank Anthropic's Security Team (ANT-2026-22453) for independently disclosing this issue!\n\n## Affected packages\n\n- `github.com/coder/coder/v2 >= 2.34.0, < 2.34.2`\n- `github.com/coder/coder/v2 >= 2.33.0, < 2.33.8`\n- `github.com/coder/coder/v2 >= 2.30.0, < 2.32.7`\n- `github.com/coder/coder/v2 < 2.29.17`\n\n## Remediation\n\nUpgrade to a patched release:\n\n- `github.com/coder/coder/v2 2.34.2`\n- `github.com/coder/coder/v2 2.33.8`\n- `github.com/coder/coder/v2 2.32.7`\n- `github.com/coder/coder/v2 2.29.17`","depth":"sunlit","depthScore":19,"depthScoreParts":{"impact":18.7,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}