GHSA-F8RJ-8X92-PFP5
Vulnerability from github – Published: 2026-08-05 09:31 – Updated: 2026-08-05 15:32HashBrown CMS through 1.4.6 contains an OS Command Injection vulnerability (CWE-78) in the media upload thumbnail generation routine. Media.generateThumbnail() in src/Server/Entity/Resource/Media.js builds a temporary file path as 'thumbnail' + Path.extname(filename) and passes it, unescaped, into a shell command executed via AppService.exec() ('convert ' + tempFile + ...). The MIME-type filter in getMIMEType() (src/Common/utilities.js) truncates the extracted extension at the first '?' character, while Path.extname() does not, allowing a filename such as 'x.jpg?$(command)' to pass the image-type check while still injecting a shell command substitution into the exec() call. An authenticated user holding the media resource scope can achieve arbitrary OS command execution in the context of the Node.js process via POST /api/{project}/{environment}/media/new.
{
"affected": [],
"aliases": [
"CVE-2026-70374"
],
"database_specific": {
"cwe_ids": [
"CWE-78"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-08-05T07:16:39Z",
"severity": "HIGH"
},
"details": "HashBrown CMS through 1.4.6 contains an OS Command Injection vulnerability (CWE-78) in the media upload thumbnail generation routine. Media.generateThumbnail() in src/Server/Entity/Resource/Media.js builds a temporary file path as \u0027thumbnail\u0027 + Path.extname(filename) and passes it, unescaped, into a shell command executed via AppService.exec() (\u0027convert \u0027 + tempFile + ...). The MIME-type filter in getMIMEType() (src/Common/utilities.js) truncates the extracted extension at the first \u0027?\u0027 character, while Path.extname() does not, allowing a filename such as \u0027x.jpg?$(command)\u0027 to pass the image-type check while still injecting a shell command substitution into the exec() call. An authenticated user holding the media resource scope can achieve arbitrary OS command execution in the context of the Node.js process via POST /api/{project}/{environment}/media/new.",
"id": "GHSA-f8rj-8x92-pfp5",
"modified": "2026-08-05T15:32:14Z",
"published": "2026-08-05T09:31:15Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-70374"
},
{
"type": "WEB",
"url": "https://cve.turansec.uz/advisories/TRN-11FC0D88"
},
{
"type": "WEB",
"url": "https://github.com/HashBrownCMS/hashbrown-cms"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
}
]
}
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