{
"id": "GHSA-47m2-wp7j-p9vc",
"aliases": [
"CVE-2026-85396"
],
"details": "rubyzip versions before 3.4.0 contain a path traversal vulnerability in Zip::Entry#extract that fails to properly validate extraction paths using prefix comparison without trailing separators. Attackers can craft archive entries with names like ../upload_backup/owned.sh to write files outside the intended extraction directory into sibling paths sharing the destination prefix.",
"affected": [],
"modified": "2026-09-03T21:31:16Z",
"severity": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N"
},
{
"type": "CVSS_V4",
"score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X"
}
],
"published": "2026-09-03T21:31:16Z",
"references": [
{
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-85396",
"type": "ADVISORY"
},
{
"url": "https://github.com/rubyzip/rubyzip/commit/17edfbf4423b83211b075acc23a7d8640da63449",
"type": "WEB"
},
{
"url": "https://github.com/geo-chen/oss/blob/main/rubyzip.md",
"type": "WEB"
},
{
"url": "https://github.com/rubyzip/rubyzip",
"type": "WEB"
},
{
"url": "https://github.com/rubyzip/rubyzip/blob/v3.3.1/lib/zip/entry.rb",
"type": "WEB"
},
{
"url": "https://github.com/rubyzip/rubyzip/releases/tag/v3.4.0",
"type": "WEB"
},
{
"url": "https://www.vulncheck.com/advisories/rubyzip-before-3.4.0-path-traversal-in-zip-entry-extract-via-sibling-directory-prefix",
"type": "WEB"
}
],
"schema_version": "1.4.0",
"database_specific": {
"cwe_ids": [
"CWE-22"
],
"severity": "HIGH",
"github_reviewed": false,
"nvd_published_at": "2026-09-03T19:17:31Z",
"github_reviewed_at": null
}
}