High
Astral uv through 0.8.21 Path Traversal via Symlinks in Sdist Tar Extraction
Type: advisorySources: OSV
Astral uv before 0.8.22 contains a path traversal vulnerability in source distribution (sdist) tar extraction that allows a specially crafted sequence of symlinks to redirect file writes outside the intended extraction prefix. Attackers can publish a malicious sdist that, when installed by a victim, writes arbitrary files to filesystem locations outside the installation prefix.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2025-71437
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 4 Nov 2026, 03:53 UTC · Revision 1
Source evidence
Astral uv through 0.8.21 Path Traversal via Symlinks in Sdist Tar Extraction
core-osv · Original sourcePublished 21 Oct 2026, 00:36 UTC
Astral uv before 0.8.22 contains a path traversal vulnerability in source distribution (sdist) tar extraction that allows a specially crafted sequence of symlinks to redirect file writes outside the intended extraction prefix. Attackers can publish a malicious sdist that, when installed by a victim, writes arbitrary files to filesystem locations outside the installation prefix.
osv:CVE-2025-71437
Complete source record
{
"id": "be5410958b21d7fb6eb9522dceccb788c6effea0b27831860f4b451856ec848c",
"url": "https://osv.dev/vulnerability/CVE-2025-71437",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "Astral uv through 0.8.21 Path Traversal via Symlinks in Sdist Tar Extraction",
"summary": "Astral uv before 0.8.22 contains a path traversal vulnerability in source distribution (sdist) tar extraction that allows a specially crafted sequence of symlinks to redirect file writes outside the intended extraction prefix. Attackers can publish a malicious sdist that, when installed by a victim, writes arbitrary files to filesystem locations outside the installation prefix.",
"evidence": "osv:CVE-2025-71437",
"products": [],
"severity": "high",
"structured": {
"id": "CVE-2025-71437",
"aliases": [
"CVE-2025-71437",
"GHSA-7j9j-68r2-f35q"
],
"metrics": [
{
"type": "CVSS_V4",
"score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N"
}
],
"affected": [
{
"ranges": [
{
"repo": "https://github.com/astral-sh/uv",
"type": "GIT",
"events": [
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},
{
"fixed": "ade2bdbd2a58c303b23976be3649ac1ed8796716"
}
],
"database_specific": {
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{
"range": [
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},
{
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}
],
"source": "AFFECTED_FIELD",
"strategy": "StandardRange"
},
{
"range": [
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},
{
"fixed": "0.8.22"
}
],
"source": "DESCRIPTION"
}
]
}
}
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],
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-71437.json"
}
}
],
"modified": "2026-10-30T02:30:54.488876509Z",
"provider": "osv",
"references": [
"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/71xxx/CVE-2025-71437.json",
"https://github.com/astral-sh/uv/security/advisories/GHSA-7j9j-68r2-f35q",
"https://nvd.nist.gov/vuln/detail/CVE-2025-71437",
"https://www.vulncheck.com/advisories/astral-uv-through-0.8.21-path-traversal-via-symlinks-in-sdist-tar-extraction"
],
"provider_metadata": {
"cwe_ids": [
"CWE-22"
],
"cna_assigner": "VulnCheck",
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/71xxx/CVE-2025-71437.json"
}
},
"related_cves": [
{
"value": "CVE-2025-71437",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 500158,
"published_at": "2026-10-21T00:36:20.284+00:00"
}