Vulnerability Database

296,733

Total vulnerabilities in the database

CVE-2023-46218

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.

  • Published: Dec 7, 2023
  • Updated: May 4, 2025
  • CVE: CVE-2023-46218
  • Severity: Medium
  • Exploit:

CVSS v3:

  • Severity: Medium
  • Score: 6.5
  • AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

No CWE or OWASP classifications available.

Software From Fixed in
haxx / curl 7.46.0 8.4.0.x
fedoraproject / fedora 39 39.x