CVE-2026-106553: In sshd in OpenSSH before 10.6, credentials can incorrectly persist after failure of a GSSAPIAuthentication au

Q: How do I fix CVE-2026-106553?

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

Q: Is CVE-2026-106553 being exploited?

CVE-2026-106553 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-2026-106553 affect?

CVE-2026-106553 affects openssh. Severity is low (CVSS 2.2). In sshd in OpenSSH before 10.6, credentials can incorrectly persist after failure of a GSSAPIAuthentication authentication attempt.

Q: How urgent is CVE-2026-106553?

Priority 13/100. On your watchlist

Routine

LOW 2.2WATCHLISTUPGRADE

CVE-2026-106553 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, credentials can incorrectly persist after failure of a GSSAPIAuthentication authentication attempt.

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 15:26 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-2026-106553?

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

Is CVE-2026-106553 being exploited?

CVE-2026-106553 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-2026-106553 affect?

CVE-2026-106553 affects openssh. Severity is low (CVSS 2.2). In sshd in OpenSSH before 10.6, credentials can incorrectly persist after failure of a GSSAPIAuthentication authentication attempt.

How urgent is CVE-2026-106553?

Priority 13/100. On your watchlist

Software pages

OpenSSH vulnerabilities

Related CVEs

CVE-2026-55655 MEDIUM 5.0 MITIGATE MITIGATE A flaw was found in OpenSSH
CVE-2026-55653 MEDIUM 4.3 MITIGATE MITIGATE A flaw was found in OpenSSH
CVE-2026-60002 HIGH 7.7 UPGRADE ssh in OpenSSH before 10.4 can have a use-after-free when a server changes its host key during a key re-exchan
CVE-2026-60001 MEDIUM 6.5 UPGRADE sshd in OpenSSH before 10.4 does not always honor the minimum authentication delay.
CVE-2026-60000 LOW 3.7 UPGRADE sshd in OpenSSH before 10.4 allows remote attackers to cause a denial of service (resource consumption from ex

References

← Back to latest CVEs