{
"id": "GHSA-h58c-xccx-75m3",
"aliases": [],
"details": "### 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!",
"summary": "Coder: Stored HTML injection via unescaped ApplicationName and LogoURL appearance settings",
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "2.34.0"
},
{
"fixed": "2.34.2"
}
]
}
],
"package": {
"name": "github.com/coder/coder/v2",
"ecosystem": "Go"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "2.33.0"
},
{
"fixed": "2.33.8"
}
]
}
],
"package": {
"name": "github.com/coder/coder/v2",
"ecosystem": "Go"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "2.30.0"
},
{
"fixed": "2.32.7"
}
]
}
],
"package": {
"name": "github.com/coder/coder/v2",
"ecosystem": "Go"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "2.29.17"
}
]
}
],
"package": {
"name": "github.com/coder/coder/v2",
"ecosystem": "Go"
}
}
],
"modified": "2026-08-20T18:34:26Z",
"severity": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:N/I:L/A:N"
}
],
"published": "2026-08-20T18:34:26Z",
"references": [
{
"url": "https://github.com/coder/coder/security/advisories/GHSA-h58c-xccx-75m3",
"type": "WEB"
},
{
"url": "https://github.com/coder/coder/pull/25804",
"type": "WEB"
},
{
"url": "https://github.com/coder/coder/commit/ec19bc41d80568c0eb9f74b526e8cc8ffbe3be9a",
"type": "WEB"
},
{
"url": "https://github.com/coder/coder",
"type": "PACKAGE"
},
{
"url": "https://github.com/coder/coder/releases/tag/v2.29.17",
"type": "WEB"
},
{
"url": "https://github.com/coder/coder/releases/tag/v2.32.7",
"type": "WEB"
},
{
"url": "https://github.com/coder/coder/releases/tag/v2.33.8",
"type": "WEB"
},
{
"url": "https://github.com/coder/coder/releases/tag/v2.34.2",
"type": "WEB"
}
],
"schema_version": "1.4.0",
"database_specific": {
"cwe_ids": [
"CWE-74"
],
"severity": "LOW",
"github_reviewed": true,
"nvd_published_at": null,
"github_reviewed_at": "2026-08-20T18:34:26Z"
}
}