CVE-2025-14819

🔶 medium

Summary

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

5.3

Medium

EPSS Score

0.0

Exploit Probability

Published Date

2026-01-08

First Seen: 2026-01-17

Last Modified 2026-01-20

Source NVD 🔗

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

CWE IDs (Weakness Types)

CWE-295

🔗 References 3

https://curl.se/docs/CVE-2025-14819.html

Vendor Advisory Mitigation Patch

https://curl.se/docs/CVE-2025-14819.json

Vendor Advisory

http://www.openwall.com/lists/oss-security/2026/01/07/5

Mailing List Third Party Advisory Mitigation Patch

📦 Affected Products 1

Vendor	Product	Status	Affected Versions
haxx	curl	Affected	≥ 7.87.0 < 8.18.0

🔗 Related CVEs 6

CVE ID	Severity	CVSS	EPSS	Summary	Published
CVE-2025-13034	🔶 medium	5.9	0.0	When using `CURLOPT_PINNEDPUBLICKEY` option with libcurl or `--pinnedpubkey` with the curl tool,curl should check the pu...	2026-01-08
CVE-2025-14017	🔶 medium	6.3	0.0	When doing multi-threaded LDAPS transfers (LDAP over TLS) with libcurl, changing TLS options in one thread would inadver...	2026-01-08
CVE-2025-14524	🔶 medium	5.3	0.0	When an OAuth2 bearer token is used for an HTTP(S) transfer, and that transfer performs a cross-protocol redirect to a s...	2026-01-08
CVE-2025-15079	🔶 medium	5.3	0.0	When doing SSH-based transfers using either SCP or SFTP, and setting the known_hosts file, libcurl could still mistakenl...	2026-01-08
CVE-2025-15224	ℹ️ low	3.1	0.1	When doing SSH-based transfers using either SCP or SFTP, and asked to do public key authentication, curl would wrongly s...	2026-01-08
CVE-2025-10966	🔶 medium	4.3	0.0	curl's code for managing SSH connections when SFTP was done using the wolfSSH powered backend was flawed and missed host...	2025-11-07

These CVEs affect the same products