CVE-2025-14017 broken TLS options for threaded LDAPS

Medium 6.3 Published 8 Jan 2026 Updated 15 Sep 2026

Concurrent LDAPS transfers in libcurl may unintentionally disable TLS certificate verification globally, bypassing security checks.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Local or same network only
Victim action needed: A user has to click or open something
Fix: Available

What is CVE-2025-14017?

CVE-2025-14017 is a medium-severity vulnerability in Haxx Curl, published on 8 Jan 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.

Official description

When doing multi-threaded LDAPS transfers (LDAP over TLS) with libcurl, changing TLS options in one thread would inadvertently change them globally and therefore possibly also affect other concurrently setup transfers.

Disabling certificate verification for a specific transfer could unintentionally disable the feature for other threads as well.

Weakness: CWE-567

Which versions are affected by CVE-2025-14017?

It affects 1 product.

Linux distribution packages (6)

`curl` SUSE:Linux Enterprise Micro 5.2	All versions	`8.14.1-150200.4.100.1`
`curl` SUSE:Linux Enterprise Module for Basesystem 15 SP7	All versions	`8.14.1-150700.7.11.1`
`curl` SUSE:Linux Enterprise Server LTSS Extended Security 12 SP5	All versions	`8.0.1-11.114.1`
`curl` SUSE:Linux Micro 6.0	All versions	`8.14.1-4.1`
`curl` SUSE:Linux Micro 6.1	All versions	`8.14.1-slfo.1.1_5.1`
`curl` openSUSE:Leap 15.6	All versions	`8.14.1-150600.4.37.1`

Products include Haxx Curl.

How do I fix CVE-2025-14017?

Upgrade to a fixed version.

Is CVE-2025-14017 being exploited?

There is no known exploitation of CVE-2025-14017 in the wild and no public exploit code.

All Haxx Curl vulnerabilities

Sources

Also known as ALPINE-CVE-2025-14017, AZL-73676, AZL-73736, AZL-73740, AZL-73743, BELL-CVE-2025-14017 and 15 more.