libcurl 7.71.0 < 8.20.0 Cookie Leak via Stale Host Header

Version 1.4

May 15, 2026, 12:01 PM

CVSS metrics ("CVSSv2 score" set to 7.8)
CVSS metrics ("CVSSv2 vector" set to "CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:C")
CVSS temporal metrics ("CVSSv2 temporal vector" set to "CVSS2#E:POC/RL:OF/RC:C")
CVSS temporal metrics ("CVSSv3 temporal vector" set to "CVSS:3.0/E:P/RL:O/RC:C")
CVSSv2 severity (based on CVE-2026-6276, severity increased from "Medium" to "High")
Exploit attributes ("Exploit available" set to "True")
Exploit attributes ("Exploitability ease" changed from "No known exploits are available" to "Exploits are available")