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NVD / CVE Program· CNA mitre

CVE-2026-59999: In sshd in OpenSSH before 10.4, DisableForwarding=yes was supposed to take precedence over PermitTunnel=yes, but did not.

Noroxi assessment

Priority: Monitor (action score 30/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.15% (FIRST EPSS).
  • Anyone who can reach it over the internet can trigger it. No account or password is required. No user action is required. No special conditions are required; it is repeatable.
  • Fixed version: azl3 openssh 9.8p1-8 on Azure Linux 3.0 9.8p1-9.

Low priority for now. Upgrade to azl3 openssh 9.8p1-8 on Azure Linux 3.0 9.8p1-9 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

HighCVSS 7.5 · v3.1—No exploit Fix available
Published
Jul 8, 2026
Updated
Oct 25, 2026
EPSS
0.1% · 5th percentile

Report tools

JSON

Action score

30

Monitor

Low priority for now.

CVSS
30 / 40 · 7.5 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.1%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
7.5
CNA · mitre
5.9
1.6 point gap

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

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2026-59999

When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
openbsdopenssh

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Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • openbsd opensshbefore 10.4

Versions reported by the vendor

Affected version ranges reported by the assigning authority (mitre). Independent of NVD's CPE analysis and usually ahead of it.

  • OpenBSD OpenSSH

    • before 10.4affected

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
AlmaLinux:10opensshbefore 9.9p1-27.el10_2.alma.19.9p1-27.el10_2.alma.1
AlmaLinux:10openssh-askpassbefore 9.9p1-27.el10_2.alma.19.9p1-27.el10_2.alma.1
AlmaLinux:10openssh-clientsbefore 9.9p1-27.el10_2.alma.19.9p1-27.el10_2.alma.1
AlmaLinux:10openssh-keycatbefore 9.9p1-27.el10_2.alma.19.9p1-27.el10_2.alma.1
AlmaLinux:10openssh-keysignbefore 9.9p1-27.el10_2.alma.19.9p1-27.el10_2.alma.1
AlmaLinux:10openssh-serverbefore 9.9p1-27.el10_2.alma.19.9p1-27.el10_2.alma.1
AlmaLinux:8opensshbefore 8.0p1-33.el8_108.0p1-33.el8_10
AlmaLinux:8openssh-askpassbefore 8.0p1-33.el8_108.0p1-33.el8_10
AlmaLinux:8openssh-cavsbefore 8.0p1-33.el8_108.0p1-33.el8_10
AlmaLinux:8openssh-clientsbefore 8.0p1-33.el8_108.0p1-33.el8_10
AlmaLinux:8openssh-keycatbefore 8.0p1-33.el8_108.0p1-33.el8_10
AlmaLinux:8openssh-ldapbefore 8.0p1-33.el8_108.0p1-33.el8_10
AlmaLinux:8openssh-serverbefore 8.0p1-33.el8_108.0p1-33.el8_10
AlmaLinux:8pam_ssh_agent_authbefore 0.10.3-8.33.el8_100.10.3-8.33.el8_10
AlmaLinux:9opensshbefore 9.9p1-11.el9_8.alma.19.9p1-11.el9_8.alma.1
AlmaLinux:9openssh-askpassbefore 9.9p1-11.el9_8.alma.19.9p1-11.el9_8.alma.1
AlmaLinux:9openssh-clientsbefore 9.9p1-11.el9_8.alma.19.9p1-11.el9_8.alma.1
AlmaLinux:9openssh-keycatbefore 9.9p1-11.el9_8.alma.19.9p1-11.el9_8.alma.1
AlmaLinux:9openssh-serverbefore 9.9p1-11.el9_8.alma.19.9p1-11.el9_8.alma.1
AlmaLinux:9pam_ssh_agent_authbefore 0.10.4-8.11.el9_8.alma.10.10.4-8.11.el9_8.alma.1
Alpine:v3.24opensshbefore 10.3_p1-r110.3_p1-r1
Debian:12opensshfrom 0—
Debian:14opensshbefore 1:10.4p1-11:10.4p1-1
openSUSE:Leap 16.0opensshbefore 10.0p2-160000.7.110.0p2-160000.7.1

+75

Same product

openbsd: all records

Other highest-scoring records for the same primary product.

  • CVE-2023-38408The PKCS#11 feature in ssh-agent in OpenSSH before 9.3p2 has an insufficiently trustworthy search path, leading to remote code execution if
    63This week
  • CVE-2018-15473OpenSSH through 7.7 is prone to a user enumeration vulnerability due to not delaying bailout for an invalid authenticating user until after
    60This week
  • CVE-2016-6210sshd in OpenSSH before 7.3, when SHA256 or SHA512 are used for user password hashing, uses BLOWFISH hashing on a static password when the us
    60This week

Published before and after this one in the same product

  • ← EarlierCVE-2026-59997Jul 8, 2026 · internal-sftp in sshd in OpenSSH before 10.4 recognizes only the first 9 command-line arguments, which can be important if a later command-l
    21Monitor
  • ← EarlierCVE-2026-59998Jul 8, 2026 · sshd in OpenSSH before 10.4 has an undocumented security-relevant behavior: GSSAPIStrictAcceptorCheck has no value if the server is in Windo
    26Monitor
  • Later →CVE-2026-60000Jul 8, 2026 · sshd in OpenSSH before 10.4 allows remote attackers to cause a denial of service (resource consumption from excessive authentication attempt
    30Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
azl3 openssh 9.8p1-8 on Azure Linux 3.09.8p1-9 · CBL-Mariner ReleasesMicrosoft (MSRC)
almalinux:openssh9.9p1-27.el10_2.alma.1 · AlmaLinux:10Package registry (OSV)
almalinux:openssh-askpass9.9p1-27.el10_2.alma.1 · AlmaLinux:10Package registry (OSV)
almalinux:openssh-cavs8.0p1-33.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:openssh-clients9.9p1-27.el10_2.alma.1 · AlmaLinux:10Package registry (OSV)
almalinux:openssh-keycat9.9p1-27.el10_2.alma.1 · AlmaLinux:10Package registry (OSV)
almalinux:openssh-keysign9.9p1-27.el10_2.alma.1 · AlmaLinux:10Package registry (OSV)
almalinux:openssh-ldap8.0p1-33.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:openssh-server9.9p1-27.el10_2.alma.1 · AlmaLinux:10Package registry (OSV)
almalinux:pam_ssh_agent_auth0.10.4-8.11.el9_8.alma.1 · AlmaLinux:9Package registry (OSV)
alpine:openssh10.3_p1-r1 · Alpine:v3.24Package registry (OSV)
debian:openssh1:10.4p1-1 · Debian:14Package registry (OSV)
opensuse:openssh10.0p2-160000.7.1 · openSUSE:Leap 16.0Package registry (OSV)
opensuse:openssh-askpass-gnome10.0p2-160000.7.1 · openSUSE:Leap 16.0Package registry (OSV)
red hat:openssh0:10.4p1-1.hum1 · Red Hat:hummingbird:1Package registry (OSV)
red hat:openssh-askpass0:10.4p1-1.hum1 · Red Hat:hummingbird:1Package registry (OSV)
red hat:openssh-askpass0:9.9p1-27.el10_2 · Red Hat:enterprise_linux:10.2Package registry (OSV)
red hat:openssh-askpass-debuginfo0:9.9p1-27.el10_2 · Red Hat:enterprise_linux:10.2Package registry (OSV)
red hat:openssh-clients0:10.4p1-1.hum1 · Red Hat:hummingbird:1Package registry (OSV)
red hat:openssh-clients0:9.9p1-27.el10_2 · Red Hat:enterprise_linux:10.2Package registry (OSV)
red hat:openssh-clients-debuginfo0:9.9p1-27.el10_2 · Red Hat:enterprise_linux:10.2Package registry (OSV)
red hat:openssh-debuginfo0:9.9p1-27.el10_2 · Red Hat:enterprise_linux:10.2Package registry (OSV)
red hat:openssh-debugsource0:9.9p1-27.el10_2 · Red Hat:enterprise_linux:10.2Package registry (OSV)
red hat:openssh-keycat0:10.4p1-1.hum1 · Red Hat:hummingbird:1Package registry (OSV)
red hat:openssh-keycat-debuginfo0:9.9p1-27.el10_2 · Red Hat:enterprise_linux:10.2Package registry (OSV)
red hat:openssh-keysign0:10.4p1-1.hum1 · Red Hat:hummingbird:1Package registry (OSV)
red hat:openssh-keysign0:9.9p1-27.el10_2 · Red Hat:enterprise_linux:10.2Package registry (OSV)
red hat:openssh-keysign-debuginfo0:9.9p1-27.el10_2 · Red Hat:enterprise_linux:10.2Package registry (OSV)
red hat:openssh-server0:10.4p1-1.hum1 · Red Hat:hummingbird:1Package registry (OSV)
red hat:openssh-server-debuginfo0:9.9p1-27.el10_2 · Red Hat:enterprise_linux:10.2Package registry (OSV)

+6

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • No account or password is required.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
none
Integrity
high · data or configuration can be modified
Availability
none
Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality impact
None
Integrity impact
High
Availability impact
None

Weakness class (CWE)

CWE-348 · Use of Less Trusted Source

CVSS vector

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

nvd-primary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

Change log

  1. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Show all references (2 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records