Is CVE-2026-59999 in the CISA KEV catalog?

No. CVE-2026-59999 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2026-59999?

CVE-2026-59999 has a CVSS v3 base score of 5.9 (Moderate).

What is the EPSS score for CVE-2026-59999?

CVE-2026-59999 has an EPSS score of 0.14% (4th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2026-59999?

Upgrade openssh on debian unstable to 1:10.4p1-1 or later. Fixes are available for 6 affected products.

CVE & CISA-KEV Catalog

CVE-2026-59999

MEDIUM

5.9

CVSS v3

NVD

Description

In sshd in OpenSSH before 10.4, DisableForwarding=yes was supposed to take precedence over PermitTunnel=yes, but did not.

CWE-348

How to fix

Remediation Available

opensshDebian

Fixed in:1:10.4p1-1CVE-2026-59999

opensshRocky

Fixed in:main@aarch64RHSA-2026:37382

Fixed in:main@srcRHSA-2026:37382

Fixed in:main@x86_64RHSA-2026:37382

opensshRed Hat / RHEL

Fixed in:main@srcRHSA-2026:37382

Fixed in:main@x86_64RHSA-2026:37382

Fixed in:main@aarch64RHSA-2026:37382

opensshUbuntu

Fixed in:1:8.9p1-3ubuntu0.16USN-8533-1

Fixed in:1:9.6p1-3ubuntu13.18USN-8533-1

openssh-clientUbuntu

Fixed in:1:8.9p1-3ubuntu0.16USN-8533-1

Fixed in:1:9.6p1-3ubuntu13.18USN-8533-1

openssh-serverUbuntu

Fixed in:1:8.9p1-3ubuntu0.16USN-8533-1

Fixed in:1:9.6p1-3ubuntu13.18USN-8533-1

TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityHigh

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityHigh

AvailabilityNone

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N

Exploit Intelligence

0.14%probability of exploitation in 30 days

4thpercentile

Low risk: more likely to be exploited than 4% of all known CVEs.

References

Mailing List1

openwall.com

Release Notes2

Related Vulnerabilities

Other CWE-348 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2025-59951	Critical	9.1	4.7%	-	-
CVE-2022-31813	Critical	9.8	3.1%	-	Fix
CVE-2024-45410	Critical	9.8	1.5%	-	Fix
CVE-2021-21373	High	7.5	1.2%	-	Fix
CVE-2021-21374	High	8.1	1.0%	-	Fix
CVE-2022-2255	High	7.5	0.7%	-	Fix

Embed a live status badge for CVE-2026-59999

Markdown

[![CVE-2026-59999](https://tridentstack.com/cve/badge/CVE-2026-59999.svg)](https://tridentstack.com/cve/CVE-2026-59999)

HTML

<a href="https://tridentstack.com/cve/CVE-2026-59999"><img src="https://tridentstack.com/cve/badge/CVE-2026-59999.svg" alt="CVE-2026-59999"></a>

Find and fix vulnerabilities across your fleet

TridentStack Control continuously scans your Windows, macOS, and Linux fleet for known vulnerabilities, prioritizes them by severity and active exploitation, and patches them automatically.

See how it works Start freeThis CVE lookup is free and always will be.

This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-07-09.