#VU121029 Improper validation of certificate with host mismatch in cURL - CVE-2025-15079
Published: January 7, 2026
Vulnerability identifier: #VU121029
Vulnerability risk: Low
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:U/U:Clear
CVE-ID: CVE-2025-15079
CWE-ID: CWE-297
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerable software:
cURL
cURL
Software vendor:
curl.haxx.se
curl.haxx.se
Description
The vulnerability allows a remote attacker to perform MitM attack.
The vulnerability exists during SSH-based transfers due to the library mistakenly accepts connections to hosts not present in the specified file if they were added as recognized in the libssh global knownhosts file. A remote attacker can perform a MitM attack.
Note, the vulnerability affects libcurl builds that use libssh backend instead of libssh2.
Remediation
Install updates from vendor's website.