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Vulnerabilities

Vulnerability · CVE-2026-0967

A flaw was found in libssh.

Published Mar 26, 2026 · catalog updated Sep 1, 2026 · A flaw was found

Check if you run it

No confirmed exploitation is on record for CVE-2026-0967. EPSS is 0.22%. Act only if a listed version of A flaw was found is installed.

Gaps on this record

  • The stored product name is a package slug. The name on this page is taken from the title (A flaw was found).
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
Medium5.5
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.22%
Remediation
Advisory link
Affected products
cpe libssh/libssh · cpe redhat/enterprise linux

A flaw was found in libssh. A remote attacker, by controlling client configuration files or known_hosts files, could craft specific hostnames that when processed by the function can lead to inefficient regular expression backtracking. This can cause timeouts and resource exhaustion, resulting in a Denial of Service (DoS) for the client.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • cpe libssh/libsshversion unspecified
  • cpe redhat/enterprise linux10.0
  • cpe redhat/enterprise linux9.0

How to fix CVE-2026-0967

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2026-0967. EPSS is 0.22%. Act only if a listed version of A flaw was found is installed.

Which versions are affected?

Compare what you have installed with redhat/enterprise linux 10.0; redhat/enterprise linux 9.0. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-1333: Inefficient Regular Expression Complexity. EPSS 0.22%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Mar 26, 2026 · NIST NVD

    Detected

    A flaw was found in libssh. A remote attacker, by controlling client configuration files or known_hosts files, could craft specific hostnames that when processed by the function can lead to inefficient regular expression backtracking. This can cause timeouts and resource exhaustion, resulting in a Denial of Service (DoS) for the client.

  2. Sep 1, 2026 · NIST NVD

    Updated

    A flaw was found in libssh. A remote attacker, by controlling client configuration files or known_hosts files, could craft specific hostnames that when processed by the function can lead to inefficient regular expression backtracking. This can cause timeouts and resource exhaustion, resulting in a Denial of Service (DoS) for the client.

Sources

  • CVE.orgVulnerability recordCVE-2026-0967

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2026-0967

    30-day exploitation probability 0.2%

    first.org
  • NIST NVDVulnerability recordCVE-2026-0967

    A flaw was found in libssh. A remote attacker, by controlling client configuration files or known_hosts files, could craft specific hostnames that when processed by the function can lead to inefficient regular expression backtracking. This can cause timeouts and

    nvd.nist.gov

References

Freshness

Last verified in this catalog Oct 18, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.