Vulnerability · Published Oct 6, 2026 · Assigned by mitre
CVE-2026-106555
Low 2.2
In plain English
A low-severity security flaw in OpenSSH from OpenBSD. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.1% (higher than 3% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)2.2Low
Exploit odds (30 days)0.1%top 96.9% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
In sshd in OpenSSH before 10.6, GSSAPIAuthentication authentication state can incorrectly be persisted across authentication attempts.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | openssh | no fix listed | DEBIAN-CVE-2026-106555 |
| Debian:13 | openssh | no fix listed | DEBIAN-CVE-2026-106555 |
| Debian:14 | openssh | 1:10.6p1-1 | DEBIAN-CVE-2026-106555 |
| Debian:14 | openssh-gssapi | 1:10.6p1-1 | DEBIAN-CVE-2026-106555 |
| Ubuntu:22.04:LTS | openssh | 1:8.9p1-3ubuntu0.18 | USN-8928-1 |
| Ubuntu:22.04:LTS | openssh | 1:8.9p1-3ubuntu0.18 | UBUNTU-CVE-2026-106555 |
| Ubuntu:24.04:LTS | openssh | 1:9.6p1-3ubuntu13.20 | USN-8928-1 |
| Ubuntu:24.04:LTS | openssh | 1:9.6p1-3ubuntu13.20 | UBUNTU-CVE-2026-106555 |
| Ubuntu:26.04:LTS | openssh | 1:10.2p1-2ubuntu3.8 | USN-8928-1 |
| Ubuntu:26.04:LTS | openssh | 1:10.2p1-2ubuntu3.8 | UBUNTU-CVE-2026-106555 |
| Ubuntu:26.10 | openssh | 1:10.5p1-1ubuntu3.1 | UBUNTU-CVE-2026-106555 |
| Ubuntu:26.10 | openssh | 1:10.5p1-1ubuntu3.1 | USN-8937-1 |
| Ubuntu:26.10 | openssh-gssapi | 1:10.5p1-1ubuntu3.1 | USN-8937-1 |
| Ubuntu:26.10 | openssh-gssapi | 1:10.5p1-1ubuntu3.1 | UBUNTU-CVE-2026-106555 |
| Ubuntu:22.04:LTS | openssh-ssh1 | no fix listed | UBUNTU-CVE-2026-106555 |
| Ubuntu:24.04:LTS | openssh-ssh1 | no fix listed | UBUNTU-CVE-2026-106555 |
| Ubuntu:26.04:LTS | openssh-ssh1 | no fix listed | UBUNTU-CVE-2026-106555 |
| Ubuntu:26.10 | openssh-ssh1 | no fix listed | UBUNTU-CVE-2026-106555 |
Affected products (as reported)
Weakness: CWE-669 · Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:L/I:N/A:N