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

Q: How do I fix CVE-2026-106555?

openssh: upgrade to 10.6. Exact commands for each OS are on this page.

Q: Is CVE-2026-106555 being exploited?

CVE-2026-106555 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-106555 affect?

CVE-2026-106555 affects openssh. Severity is low (CVSS 2.2). In sshd in OpenSSH before 10.6, GSSAPIAuthentication authentication state can incorrectly be persisted across authentication attempts.

Q: How urgent is CVE-2026-106555?

Priority 13/100. On your watchlist

Routine

LOW 2.2WATCHLISTUPGRADE

CVE-2026-106555 is a low-severity flaw (CVSS 2.2) affecting openssh. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

In sshd in OpenSSH before 10.6, GSSAPIAuthentication authentication state can incorrectly be persisted across authentication attempts.

Why this priority

On your watchlist

A fixed release or distro patch exists.

Risk facts

CVSS score	2.2 (Low)
Attack vector	Local
Attack complexity	High
Privileges needed	Low
User interaction	Required
EPSS exploit chance	0.1% (top 97%)
CISA exploited list	No
Weakness	CWE-669
Published	2026-10-06
Last modified	2026-10-13

Publisher (CNA): MITRE · Vendor: openbsd

Last updated 2026-10-13 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-10-06 21:17 UTCPublished CVE record published
2026-10-13 14:59 UTCUpdated Record last modified

openbsd openssh UPGRADE

Affected: < 10.6

Fixed in: 10.6

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy openssh || rpm -q openssh || openssh --version

2. UPGRADE to 10.6 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade openssh

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade openssh

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-106555?

openssh: upgrade to 10.6. Exact commands for each OS are on this page.

Is CVE-2026-106555 being exploited?

CVE-2026-106555 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-106555 affect?

CVE-2026-106555 affects openssh. Severity is low (CVSS 2.2). In sshd in OpenSSH before 10.6, GSSAPIAuthentication authentication state can incorrectly be persisted across authentication attempts.

How urgent is CVE-2026-106555?

Priority 13/100. On your watchlist

Software pages

OpenSSH vulnerabilities

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CVE-2026-60001 MEDIUM 6.5 UPGRADE sshd in OpenSSH before 10.4 does not always honor the minimum authentication delay.
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References

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