Exposure of Data Element to Wrong Session Affecting libcurl package, versions [8.21.0,8.23.0)
Do your applications use this vulnerable package?
In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.
Test your applications- Snyk IDSNYK-CONAN-LIBCURL-21195759
- published18 Oct 2026
- disclosed14 Oct 2026
- creditUnknown
Introduced: 14 Oct 2026
NewCVE-2026-86411 (opens in a new tab)Common Vulnerabilities and Exposures (CVE) are common identifiers for publicly known security vulnerabilities
Common Weakness Enumeration (CWE) is a category system for software weaknesses
How to fix?
Upgrade libcurl to version 8.23.0 or higher.
Overview
Affected versions of this package are vulnerable to Exposure of Data Element to Wrong Session due to improper reuse of pooled FTP connections previously authenticated with client certificates. An attacker can gain unauthorized access to remote server resources by initiating an unencrypted FTP transfer that reuses a connection originally established with certificate authentication. This is only exploitable if a client application shares a connection pool across both certificate-authenticated FTP sessions and unauthenticated cleartext transfers.