CVE-2025-14819

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 3.1

5.3CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:N/A:N

EPSS

0.8% chance of exploitation in the next 30 days; higher than 54% of CVEs (scores of 2026-10-25)

CWE

CWE-295

Published

2026-01-08

Modified

2026-10-14

Record from

the NVD, synced 2026-10-19

Affected

• haxx:curl

References

• https://curl.se/docs/CVE-2025-14819.html
• https://curl.se/docs/CVE-2025-14819.json
• http://www.openwall.com/lists/oss-security/2026/01/07/5

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