#VU121027 Improper Certificate Validation in cURL - CVE-2025-14819
Published: January 7, 2026
Vulnerability identifier: #VU121027
Vulnerability risk: Low
CVSSv4.0: CVSS:4.0/AV:N/AC:H/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-2025-14819
CWE-ID: CWE-295
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 due to the way libcurl handles TLS transfers when using the CURLSSLOPT_NO_PARTIALCHAIN option. A remote attacker can trick the library into re-using a CA store cached in memory for which the partial chain option was reversed, leading to store policy bypass and a potential MitM attack.
Remediation
Install updates from vendor's website.