CVE-2026-80231

HIGH CVSS 3.1: 7.5 EPSS 0.94%
Updated Sep 15, 2026
Curl
Parameter Value
CVSS 7.5 (HIGH)
Affected Versions 7.71.0 — 8.22.0
Fixed In 8.22.0
Type CWE-488, CWE-488 Exposure of Data Element to Wrong Session
Vendor Curl
Public PoC No

A flaw in libcurl makes it wrongly reuse an existing HTTPS connection setup for a given hostname even when using a different Native CA Store setting (`CURLSSLOPT_NATIVE_CA`) than when the connection was created.

Attack Parameters

Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Privileges Required
None
No privileges needed
User Interaction
None
No user interaction needed

Impact Assessment

Confidentiality
None
No data leak
Integrity
None
No data modification
Availability
High
Complete denial of service

CVSS Vector v3.1

Vulnerable Products 1

Configuration From (including) Up to (excluding)
Haxx Curl
cpe:2.3:a:haxx:curl:*:*:*:*:*:*:*:*
7.71.0 8.22.0