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[GHSA-47m2-wp7j-p9vc] rubyzip versions before 3.4.0 contain a path traversal... #9391

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[GHSA-47m2-wp7j-p9vc] rubyzip versions before 3.4.0 contain a path traversal... #9391

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31 changes: 24 additions & 7 deletions advisories/unreviewed/2026/09/GHSA-47m2-wp7j-p9vc/GHSA-47m2-wp7j-p9vc.json
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{
"schema_version": "1.4.0",
"id": "GHSA-47m2-wp7j-p9vc",
"modified": "2026-09-03T21:31:16Z",
"modified": "2026-09-03T21:31:20Z",
"published": "2026-09-03T21:31:16Z",
"aliases": [
"CVE-2026-85396"
],
"summary": "Path traversal in rubyzip versions before 3.4.0",
"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.",
"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"
"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"
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}
],
"affected": [
{
"package": {
"ecosystem": "RubyGems",
"name": "rubyzip"
},
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "3.4.0"
}
]
}
]
}
],
"affected": [],
"references": [
{
"type": "ADVISORY",
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