🛡️ CVE-2023-46218
🟡 CVSS 6.5 — Medium ⚠️ Exploit Public CWE-178 NVD
6.5
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

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.

Details

Severity MEDIUM
CVSS Score 6.5
CVSS Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
CWE CWE-178
Public Exploit ⚠️ Yes
Source NVD
Published 2023-12-07
Updated 2026-06-08
Modified 2026-05-12

Affected Packages

Software From version Fixed in
curl 7.46.0 8.4.0
fedora — —

References

Exploit, Issue Tracking, Patch, Third Party Advisory https://hackerone.com/reports/2212193
Exploit, Issue Tracking, Patch, Third Party Advisory https://hackerone.com/reports/2212193

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