Vulnerability Description
When doing TLS related transfers with reused easy or multi handles and altering the `CURLSSLOPT_NO_PARTIALCHAIN` option, libcurl could accidentally reuse a CA store cached in memory for which the partial chain option was reversed. Contrary to the user's wishes and expectations. This could make libcurl find and accept a trust chain that it otherwise would not.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Haxx | Curl | >= 7.87.0, < 8.18.0 |
Related Weaknesses (CWE)
References
- https://curl.se/docs/CVE-2025-14819.htmlVendor AdvisoryMitigationPatch
- https://curl.se/docs/CVE-2025-14819.jsonVendor Advisory
- http://www.openwall.com/lists/oss-security/2026/01/07/5Mailing ListThird Party AdvisoryMitigation
FAQ
What is CVE-2025-14819?
CVE-2025-14819 is a vulnerability with a CVSS score of 5.3 (MEDIUM). When doing TLS related transfers with reused easy or multi handles and altering the `CURLSSLOPT_NO_PARTIALCHAIN` option, libcurl could accidentally reuse a CA store cached in memory for which the par...
How severe is CVE-2025-14819?
CVE-2025-14819 has been rated MEDIUM with a CVSS base score of 5.3/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2025-14819?
Check the references section above for vendor advisories and patch information. Affected products include: Haxx Curl.