---
id: CVE-2025-14017
title: |-
  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 certifi…
summary: |-
  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 certifi…
severity: medium
cvss: 6.3
cvssVector: 'CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N'
cwe:
  - CWE-567
vendor: haxx
product: curl
affected:
  - 'curl >= 7.17.0, < 8.18.0'
patched:
  - curl 8.18.0
published: '2026-01-08'
updated: '2026-09-15'
sourceUpdated: '2026-09-15T07:16:23.753'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2025-14017'
references:
  - url: 'https://curl.se/docs/CVE-2025-14017.html'
    label: 2499f714-1537-4658-8207-48ae4bb9eae9
  - url: 'https://curl.se/docs/CVE-2025-14017.json'
    label: 2499f714-1537-4658-8207-48ae4bb9eae9
  - url: 'http://www.openwall.com/lists/oss-security/2026/01/07/3'
    label: af854a3a-2127-422b-91ae-364da2661108
tags:
  - nvd
  - cve.org
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-04-29T00:00:00+00:00'
epss: 0.00116
epssPercentile: 0.01434
ingestedAt: '2026-09-15T07:33:29.258Z'
---

## Overview

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.

## Affected

- `curl >= 7.17.0, < 8.18.0`

## Remediation

Upgrade past the affected range:

- `curl 8.18.0`