Improper Certificate Validation in cURL - CVE-2025-14819
Published: January 7, 2026
Vulnerability identifier: #VU121027
CSH Severity: Low
CVSS v4.0: 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
Vendor: curl.haxx.se
Affected software:
cURL
cURL
Detailed vulnerability 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.
How to mitigate CVE-2025-14819
Install updates from vendor's website.