Multiple Releases of Same Resource or Handle Affecting libssh2 package, versions [0,]
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-CONAN-LIBSSH2-21248787
- published19 Oct 2026
- disclosed24 Jul 2026
- creditUnknown
Introduced: 24 Jul 2026
CVE-2026-66032 (opens in a new tab)How to fix?
A fix was pushed into the master branch but not yet published.
Overview
Affected versions of this package are vulnerable to Multiple Releases of Same Resource or Handle in the sftp_open function. An attacker can execute arbitrary code on the client system by enticing a user to connect to a specially crafted SSH server and initiate an SFTP transfer. This is only exploitable if the client connects to a malicious server and initiates an SFTP session.
Workaround
This vulnerability can be mitigated by restricting clients to connect only to fully trusted, internal SFTP servers and configuring dependent applications with Restart=on-failure in systemd to leverage memory protection and auto-recovery.