HighFix available
py3-urllib3 — security advisory
urllib3 is a user-friendly HTTP client library for Python. urllib3 doesn't treat the `Cookie` HTTP header special or provide any helpers for managing cookies over HTTP, that is the responsibility of the user. However, it is possible for a user to specify a `Cookie` header and unknowingly leak information via HTTP redirects to a different origin if that user doesn't disable redirects explicitly. This issue has been patched in urllib3 version 1.26.17 or 2.0.5.
- Products
- py3-urllib3
- Affected versions
- Not specified
- Fixed versions
- 1.26.17-r0
- CVEs
- CVE-2023-43804
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 1 Nov 2026, 15:00 UTC · Revision 1
Source evidence
urllib3 is a user-friendly HTTP client library for Python. urllib3 doesn't treat the `Cookie` HTTP header special or provide any helpers for managing cookies over HTTP, that is the responsibility of the user. However, it is possible for a user to specify a `Cookie` header and unknowingly leak information via HTTP redirects to a different origin if that user doesn't disable redirects explicitly. This issue has been patched in urllib3 version 1.26.17 or 2.0.5.
osv:ALPINE-CVE-2023-43804
py3-urllib3
Fixed versions: 1.26.17-r0
py3-urllib3
Fixed versions: 1.26.17-r0
py3-urllib3
Fixed versions: 1.26.17-r0
py3-urllib3
Fixed versions: 1.26.17-r0
py3-urllib3
Fixed versions: 1.26.17-r0
py3-urllib3
Fixed versions: 1.26.17-r0
py3-urllib3
Fixed versions: 1.26.17-r0
py3-urllib3
Fixed versions: 1.26.17-r0
py3-urllib3
Fixed versions: 1.26.17-r0
py3-urllib3
Fixed versions: 1.26.17-r0
Complete source record
{
"id": "8aa89f96c1be39d73d17b098f5c917610d128a19c5821e54961c47e4c889efaf",
"url": "https://osv.dev/vulnerability/ALPINE-CVE-2023-43804",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "ALPINE-CVE-2023-43804",
"summary": "urllib3 is a user-friendly HTTP client library for Python. urllib3 doesn't treat the `Cookie` HTTP header special or provide any helpers for managing cookies over HTTP, that is the responsibility of the user. However, it is possible for a user to specify a `Cookie` header and unknowingly leak information via HTTP redirects to a different origin if that user doesn't disable redirects explicitly. This issue has been patched in urllib3 version 1.26.17 or 2.0.5.",
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"severity": "high",
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"aliases": [
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}
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"modified": "2026-10-26T17:17:58.644527646Z",
"provider": "osv",
"upstream": [
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],
"references": [
"https://security.alpinelinux.org/vuln/CVE-2023-43804"
]
},
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"evidence": "/upstream"
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"security_relevant": true,
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},
"source_id": "core-osv",
"document_id": 454511,
"published_at": "2023-10-04T17:15:10.163+00:00"
}