Is CVE-2026-0965 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-0965 being exploited in the wild.

How severe is CVE-2026-0965?

Low severity, with a CVSS score of 3.3, published 26 March 2026.

Which products and versions are affected?

Libssh up to (including) 0.11.3.

Is there a fix for CVE-2026-0965?

A patch was published on 2026-05-19: Red Hat released security update RHSA-2026:18160 Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

How is CVE-2026-0965 attacked?

It is attacked with local access, in a software library.

Am I affected by CVE-2026-0965?

Check whether you run Libssh, Red Hat Enterprise Linux 10.0 or Red Hat Enterprise Linux 9.0 at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-0965: libssh Denial of Service via arbitrary file access in configuration parsing

CVE-2026-0965 · Severity: low · CVSS 3.3 · Published 2026-03-26

libssh is a software library used by applications to communicate securely using the SSH protocol. A vulnerability exists where the library may attempt to open non-standard or excessively large files while reading its configuration settings. A local attacker could exploit this to cause a system slowdown or crash (Denial of Service) by forcing the application to access dangerous system components like block devices or pipes.

Technologies: Libssh, Red Hat Enterprise Linux 10.0, Red Hat Enterprise Linux 9.0. Vendors: Libssh, Red Hat.

Quick answers

Is CVE-2026-0965 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-0965 being exploited in the wild.
How severe is CVE-2026-0965?: Low severity, with a CVSS score of 3.3, published 26 March 2026.
Which products and versions are affected?: Libssh up to (including) 0.11.3.
Is there a fix for CVE-2026-0965?: A patch was published on 2026-05-19: Red Hat released security update RHSA-2026:18160 Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-0965 attacked?: It is attacked with local access, in a software library.
Am I affected by CVE-2026-0965?: Check whether you run Libssh, Red Hat Enterprise Linux 10.0 or Red Hat Enterprise Linux 9.0 at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

A vulnerability classified as External Control of File Name or Path (CWE-73) exists in libssh's configuration parsing logic. The library fails to validate that configuration files (including those loaded via ssh_config_parse_file, ssh_bind_config_parse_file, or globbed includes) are regular files of a reasonable size. A local attacker with the ability to provide a malicious configuration file or exploit a system misconfiguration can force the library to open block devices, FIFOs, named pipes, or extremely large files. This can lead to a Denial of Service by exhausting system resources or hanging the process. The fix involves restricting the library to only read regular files and enforcing a 16MB size limit on configuration files.

Affected products

libssh libssh up to (including) 0.11.3
Red Hat Enterprise Linux 9.0
Red Hat Enterprise Linux 10.0

Timeline

2026-02-04: other: Reported to Red Hat Bugzilla
2026-03-26: disclosed: Initial NVD publication
2026-05-19: patched: Red Hat released security update RHSA-2026:18160

References

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