How severe is CVE-2026-106589?

CVE-2026-106589 has a CVSS 3.x base score of 2.9, rated low severity. It is exploitable over local access with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity low, and availability none.

Is CVE-2026-106589 being actively exploited?

It is not currently listed in CISA's Known Exploited Vulnerabilities catalog, and no EPSS exploit-prediction score is available yet.

How do I fix CVE-2026-106589?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2026-106589 published?

CVE-2026-106589 was published on 2026-10-06.

CVE-2026-106589

CVE-2026-106589 is a low-severity vulnerability with a CVSS 3.x base score of 2.9. The underlying weakness is classified as CWE-272.

Key facts

Severity: Low (CVSS 3.x base score 2.9)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-272
Published: 2026-10-06
Last modified: 2026-10-06

Description

In sshd in OpenSSH through 10.6, in certain environments such as QNX 6 and SCO OpenServer 5, sshd-session can unexpectedly have root privileges. This is related to the GatewayPorts and StreamLocalForwarding configuration options, and lack of support for file-descriptor passing and unprivileged allocation of PTY devices.

Frequently asked questions

What is CVE-2026-106589?: In sshd in OpenSSH through 10.6, in certain environments such as QNX 6 and SCO OpenServer 5, sshd-session can unexpectedly have root privileges. This is related to the GatewayPorts and StreamLocalForwarding configuration options, and lack of support for file-descriptor passing and unprivileged allocation of PTY devices.
How severe is CVE-2026-106589?: CVE-2026-106589 has a CVSS 3.x base score of 2.9, rated low severity. It is exploitable over local access with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity low, and availability none.
Is CVE-2026-106589 being actively exploited?: It is not currently listed in CISA's Known Exploited Vulnerabilities catalog, and no EPSS exploit-prediction score is available yet.
How do I fix CVE-2026-106589?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2026-106589 published?: CVE-2026-106589 was published on 2026-10-06.

References

https://www.openssh.org/releasenotes.html#10.6

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