CVE-2025-14017
curl: curl: Security bypass due to global TLS option changes in multi-threaded LDAPS transfers
Severity
ModerateRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · January 8, 2026
Updated · October 16, 2026
Description
A flaw was found in curl. When performing multi-threaded LDAPS (Lightweight Directory Access Protocol Secure) transfers, changes to Transport Layer Security (TLS) options in one thread could inadvertently apply globally, affecting other concurrent transfers. This could lead to unintended security posture changes, such as disabling certificate verification for other threads. This vulnerability can result in a security bypass, where expected security checks are not performed.
Statement
This vulnerability is rated Moderate for Red Hat. The flaw in curl affects multi-threaded LDAPS transfers where changes to TLS options in one thread could inadvertently apply globally, impacting other concurrent transfers. This could lead to a security bypass if an application relies on specific TLS settings that are then overridden. Impact is limited to applications utilizing libcurl for multi-threaded LDAPS connections that dynamically modify TLS options.
CVSS score applicability
The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.
Mitigation
Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
CVSS / CWE
CVSS 3.1 · 4.8CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N
CWE-1058 · Invokable Control Element in Multi-Thread Context with non-Final Static Storable or Member Element