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.
Fix
Patch, vendor advisory and mitigation references on NVD 3
- https://curl.se/docs/CVE-2025-14819.html Mitigation, Patch, Vendor Advisory
- https://curl.se/docs/CVE-2025-14819.json Vendor Advisory
- http://www.openwall.com/lists/oss-security/2026/01/07/5 Mailing List, Mitigation, Patch, Third Party Advisory
Every line above is quoted from NVD, CISA, Microsoft, the vendor's own advisory or DISA; nothing is generated.
Change history 1
- First seenCVSS 5.3 · haxxNVD modified 2026-10-14 19:10
Affected (CPE criteria) 1
cpe:2.3:a:haxx:curl:*:*:*:*:*:*:*:*
References 3
- https://curl.se/docs/CVE-2025-14819.html Mitigation, Patch, Vendor Advisory
- https://curl.se/docs/CVE-2025-14819.json Vendor Advisory
- http://www.openwall.com/lists/oss-security/2026/01/07/5 Mailing List, Mitigation, Patch, Third Party Advisory