MediumFix available
curl — security advisory
This flaw allows a malicious HTTP server to set "super cookies" in curl that are then passed back to more origins than what is otherwise allowed or possible. This allows a site to set cookies that then would get sent to different and unrelated sites and domains. It could do this by exploiting a mixed case flaw in curl's function that verifies a given cookie domain against the Public Suffix List (PSL). For example a cookie could be set with `domain=co.UK` when the URL used a lower case hostname `curl.co.uk`, even though `co.uk` is listed as a PSL domain.
- Products
- curl
- Affected versions
- Not specified
- Fixed versions
- 8.5.0-r0
- CVEs
- CVE-2023-46218
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 1 Nov 2026, 15:01 UTC · Revision 1
Source evidence
This flaw allows a malicious HTTP server to set "super cookies" in curl that are then passed back to more origins than what is otherwise allowed or possible. This allows a site to set cookies that then would get sent to different and unrelated sites and domains. It could do this by exploiting a mixed case flaw in curl's function that verifies a given cookie domain against the Public Suffix List (PSL). For example a cookie could be set with `domain=co.UK` when the URL used a lower case hostname `curl.co.uk`, even though `co.uk` is listed as a PSL domain.
osv:ALPINE-CVE-2023-46218
curl
Fixed versions: 8.5.0-r0
curl
Fixed versions: 8.5.0-r0
curl
Fixed versions: 8.5.0-r0
curl
Fixed versions: 8.5.0-r0
curl
Fixed versions: 8.5.0-r0
curl
Fixed versions: 8.5.0-r0
curl
Fixed versions: 8.5.0-r0
curl
Fixed versions: 8.5.0-r0
curl
Fixed versions: 8.5.0-r0
curl
Fixed versions: 8.5.0-r0
Complete source record
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"modified": "2026-10-26T17:17:58.647762549Z",
"provider": "osv",
"upstream": [
"CVE-2023-46218"
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"references": [
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"source_id": "core-osv",
"document_id": 454522,
"published_at": "2023-12-07T01:15:07.16+00:00"
}