CVE-2025-14017

Published Jan 8, 2026

Last updated 3 months ago

CVSS medium 6.3
Curl
Libcurl

Overview

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.
Source
2499f714-1537-4658-8207-48ae4bb9eae9
NVD status
Analyzed
Products
curl

Risk scores

CVSS 3.1

Type
Secondary
Base score
6.3
Impact score
5.2
Exploitability score
1
Vector string
CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N
Severity
MEDIUM

Weaknesses

nvd@nist.gov
NVD-CWE-Other

Social media

Hype score
Not currently trending
  1. ๐Ÿ” Lambda Watchdog detected that CVE-2025-14017 is no longer present in latest AWS Lambda base image scans. https://t.co/5for9nfqv6 #AWS #Lambda #Security #CVE #DevOps #SecOps

    @LambdaWatchdog

    15 Mar 2026

    138 Impressions

    0 Retweets

    0 Likes

    0 Bookmarks

    0 Replies

    0 Quotes

  2. ๐Ÿ” Lambda Watchdog detected that CVE-2025-14017 is no longer present in latest AWS Lambda base image scans. https://t.co/5for9nfqv6 #AWS #Lambda #Security #CVE #DevOps #SecOps

    @LambdaWatchdog

    14 Mar 2026

    134 Impressions

    0 Retweets

    0 Likes

    0 Bookmarks

    0 Replies

    0 Quotes

  3. ๐Ÿ” Lambda Watchdog detected that CVE-2025-14017 is no longer present in latest AWS Lambda base image scans. https://t.co/5for9nfqv6 #AWS #Lambda #Security #CVE #DevOps #SecOps

    @LambdaWatchdog

    13 Mar 2026

    97 Impressions

    0 Retweets

    0 Likes

    0 Bookmarks

    0 Replies

    0 Quotes

  4. Critical security update analysis published: CVE-2025-14017 in curl for #Fedora 42 Just analyzed the recently patched TLS vulnerability affecting threaded LDAPS operations in curl. Read more: ๐Ÿ‘‰ https://t.co/uOKPhn5Tiw #Security https://t.co/T8hL8BLs3S

    @Cezar_H_Linux

    28 Jan 2026

    60 Impressions

    0 Retweets

    0 Likes

    0 Bookmarks

    0 Replies

    0 Quotes

  5. ๐Ÿšจ Breaking: 5 cURL vulnerabilities patched in #SUSE Linux Micro 6.2 (CVE-2025-14017, -14524, -14819, -15079, -15224). Includes bearer token leaks & SSH bypasses. Immediate patching required for internet-facing systems. Read more: ๐Ÿ‘‰ https://t.co/cGvp3bFOZR #Security h

    @Cezar_H_Linux

    23 Jan 2026

    25 Impressions

    0 Retweets

    0 Likes

    0 Bookmarks

    0 Replies

    0 Quotes

  6. ๐Ÿšจ Critical cURL patch released: CVE-2025-14017. Impacts #SUSE Linux (SLES 15 SP4). Patch to curl 7.87.0-150400.7.26.1 immediately. Read more: ๐Ÿ‘‰ https://t.co/ky3TvcgvJx #Security https://t.co/QiE7YDetep

    @Cezar_H_Linux

    9 Jan 2026

    50 Impressions

    0 Retweets

    0 Likes

    0 Bookmarks

    0 Replies

    0 Quotes

  7. CRITICAL: #openSUSE Leap 15.6 security update addresses curl vulnerability CVE-2025-14017 affecting threaded LDAPS TLS options. Read more: ๐Ÿ‘‰ https://t.co/98Tx8L0sto #Security https://t.co/ZHZAqTt9IW

    @Cezar_H_Linux

    9 Jan 2026

    6 Impressions

    0 Retweets

    0 Likes

    0 Bookmarks

    0 Replies

    0 Quotes

  8. URGENT: #openSUSE Leap 15.6 security update for curl (CVE-2025-14017) patches a critical TLS options flaw in threaded LDAPS. Read more: ๐Ÿ‘‰ https://t.co/EVVwxnKFom #Security https://t.co/1j8dKzly0f

    @Cezar_H_Linux

    9 Jan 2026

    18 Impressions

    0 Retweets

    0 Likes

    0 Bookmarks

    0 Replies

    0 Quotes

  9. 6 CVEs in curl https://t.co/sgfRoHLxb5 2 are Medium severity: CVE-2025-13034: No QUIC certificate pinning with GnuTLS CVE-2025-14017: broken TLS options for threaded LDAPS 4 more are Low severity

    @oss_security

    9 Jan 2026

    416 Impressions

    2 Retweets

    5 Likes

    0 Bookmarks

    0 Replies

    0 Quotes

  10. CVE-2025-14017 When doing multi-threaded LDAPS transfers (LDAP over TLS) with libcurl, changing TLS options in one thread would inadvertently change them globally and therefore possโ€ฆ https://t.co/0B2ZG3QwoA

    @CVEnew

    8 Jan 2026

    223 Impressions

    0 Retweets

    0 Likes

    0 Bookmarks

    0 Replies

    0 Quotes

  11. CVE-2025-14017 [ADVISORY] curl CVE-2025-14017 https://t.co/2tyQZLrdVu

    @VulmonFeeds

    7 Jan 2026

    9 Impressions

    0 Retweets

    0 Likes

    0 Bookmarks

    0 Replies

    0 Quotes

Configurations

  1. libcurl can in some circumstances reuse the wrong connection when asked to do an Negotiate-authenticated HTTP or HTTPS request. libcurl features a pool of recent connections so that subsequent requests can reuse an existing connection to avoid overhead. When reusing a connection a range of criterion must first be met. Due to a logical error in the code, a request that was issued by an application could wrongfully reuse an existing connection to the same server that was authenticated using different credentials. One underlying reason being that Negotiate sometimes authenticates *connections* and not *requests*, contrary to how HTTP is designed to work. An application that allows Negotiate authentication to a server (that responds wanting Negotiate) with `user1:password1` and then does another operation to the same server also using Negotiate but with `user2:password2` (while the previous connection is still alive) - the second request wrongly reused the same connection and since it then sees that the Negotiate negotiation is already made, it just sends the request over that connection thinking it uses the user2 credentials when it is in fact still using the connection authenticated for user1... The set of authentication methods to use is set with `CURLOPT_HTTPAUTH`. Applications can disable libcurl's reuse of connections and thus mitigate this problem, by using one of the following libcurl options to alter how connections are or are not reused: `CURLOPT_FRESH_CONNECT`, `CURLOPT_MAXCONNECTS` and `CURLMOPT_MAX_HOST_CONNECTIONS` (if using the curl_multi API).โ€ขCVE-2026-1965