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CVE.org (no NVD analysis yet)· CNA mitre

CVE-2026-106555: In sshd in OpenSSH before 10.6, GSSAPIAuthentication authentication state can incorrectly be persisted across authentication attempts.

HighCVSS 7.5 · v3.1—No exploit Fix available

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: 0.13% (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 9.8p1-10 on Azure Linux 3.0 Release Notes.
  • Severity is disputed: the assigning authority (CNA) scores it 2.2, NVD 7.5.
  • Mentioned 1 time in Turkish national cyber security advisories (siberguvenlik.gov.tr).

Low priority for now. Upgrade to azl3 openssh 9.8p1-10 on Azure Linux 3.0 Release Notes 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

Published
Oct 6, 2026
Updated
Oct 13, 2026
EPSS
0.1% · 3th 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
2.2
5.3 point gap

CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:L/I:N/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-2026-106555

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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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 10.6affected

Affected versions

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

  • openbsd opensshbefore 10.6

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12opensshfrom 0—
Debian:14opensshbefore 1:10.6p1-11:10.6p1-1
Debian:14openssh-gssapibefore 1:10.6p1-11:10.6p1-1
Red Hat:hummingbird:1opensshbefore 0:10.5p1-1.3.hum10:10.5p1-1.3.hum1
Red Hat:hummingbird:1openssh-askpassbefore 0:10.5p1-1.3.hum10:10.5p1-1.3.hum1
Red Hat:hummingbird:1openssh-clientsbefore 0:10.5p1-1.3.hum10:10.5p1-1.3.hum1
Red Hat:hummingbird:1openssh-keycatbefore 0:10.5p1-1.3.hum10:10.5p1-1.3.hum1
Red Hat:hummingbird:1openssh-keysignbefore 0:10.5p1-1.3.hum10:10.5p1-1.3.hum1
Red Hat:hummingbird:1openssh-serverbefore 0:10.5p1-1.3.hum10:10.5p1-1.3.hum1
Red Hat:hummingbird:1openssh-sk-dummybefore 0:10.5p1-1.3.hum10:10.5p1-1.3.hum1

Same product

openbsd: all records

Other highest-scoring records for the same primary product.

  • CVE-2026-123158sshd in OpenSSH before 10.6p2 on Linux, when musl libc is used without PAM, lacks a workaround for a password authentication bypass…KEV
    68This week
  • 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

Published before and after this one in the same product

  • ← EarlierCVE-2026-106552Oct 6, 2026 · In sftp in OpenSSH before 10.6, a server can trigger directory traversal (causing files to be written to unintended locations) during a…
    26Monitor
  • ← EarlierCVE-2026-106553Oct 6, 2026 · In sshd in OpenSSH before 10.6, credentials can incorrectly persist after failure of a GSSAPIAuthentication authentication attempt.
    30Monitor
  • Later →CVE-2026-106582Oct 6, 2026 · In sshd and ssh in OpenSSH before 10.6, an LZ77 dictionary coder can be used even though this is contraindicated by the arXiv 2609.07709…
    14Monitor

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 9.8p1-10 on Azure Linux 3.0Release NotesMicrosoft (MSRC)
debian:openssh1:10.6p1-1 · Debian:14Package registry (OSV)
debian:openssh-gssapi1:10.6p1-1 · Debian:14Package registry (OSV)
red hat:openssh0:10.5p1-1.3.hum1 · Red Hat:hummingbird:1Package registry (OSV)
red hat:openssh-askpass0:10.5p1-1.3.hum1 · Red Hat:hummingbird:1Package registry (OSV)
red hat:openssh-clients0:10.5p1-1.3.hum1 · Red Hat:hummingbird:1Package registry (OSV)
red hat:openssh-keycat0:10.5p1-1.3.hum1 · Red Hat:hummingbird:1Package registry (OSV)
red hat:openssh-keysign0:10.5p1-1.3.hum1 · Red Hat:hummingbird:1Package registry (OSV)
red hat:openssh-server0:10.5p1-1.3.hum1 · Red Hat:hummingbird:1Package registry (OSV)
red hat:openssh-sk-dummy0:10.5p1-1.3.hum1 · Red Hat:hummingbird:1Package registry (OSV)

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.

  1. Published
  2. Fix recorded+6 d
  3. TodayNov 14, 2026+38 d
EPSS, last 120 days

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

Variant candidates

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

  • CVE-2026-1065530 days apartIn sshd in OpenSSH before 10.6, credentials can incorrectly persist after failure of a GSSAPIAuthentication authentication attempt.
    30Monitor
  • CVE-2026-7328156 days apartIn ssh-agent in OpenSSH before 10.5, some operations can occur remotely but were intended to occur only locally, including operations that…
    14Monitor

National notice (Türkiye Cybersecurity Directorate / USOM)

Official security notices citing this record; remediation advice is on the agency's page.

All national notices →

Not on record for this CVE: patch commit or PR link · researcher credit · public bounty program.

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-669 · Incorrect Resource Transfer Between Spheres

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.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

Change log

  1. CVSS2.2 → 7.5
  2. Severitylow → high
  3. Fix✗ → ✓
  4. SSVC exploitation— → none
  5. Exploit maturity— → none

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

References

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

All records