CVE-2026-87865
Published:October 20, 2026
Updated:November 02, 2026
When libcurl uses libssh2 with a hashed "known_hosts" file, an unrelated
initial entry can cause host key validation to report a key mismatch as a
missing key to the "CURLOPT_SSH_KEYFUNCTION" callback.
Affected Packages
libcurl (CONAN):
Affected version(s) =8.22.0 <8.23.0Fix Suggestion:
Update to version 8.23.0https://github.com/curl/curl.git (GITHUB):
Affected version(s) =curl-8_22_0 <curl-8_23_0Fix Suggestion:
Update to version curl-8_23_0Additional Notes
The description of this vulnerability differs from MITRE.
Related Resources (4)
Do you need more information?
Contact UsCVSS v4
Base Score:
9.1
Attack Vector
NETWORK
Attack Complexity
HIGH
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
NONE
Vulnerable System Confidentiality
HIGH
Vulnerable System Integrity
HIGH
Vulnerable System Availability
NONE
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
7.4
Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
NONE
Weakness Type (CWE)
Improper Certificate Validation
EPSS
Base Score:
0.60