CVE-2025-14819
Medium
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.
SeverityMedium
CVSS5.3
Exploit probability—
ProductHaxx Curl
PublishedJan 8, 2026
First seenJan 8, 2026
Weakness typeCWE-295CWE-295
How to fix
Update
- haxx curl8.18.0 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| haxx curl | 7.87.0 ≤ v < 8.18.0 | 8.18.0 |
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