CVE-2026-106555
published 2026-10-06CVE-2026-106555: In sshd in OpenSSH before 10.6, GSSAPIAuthentication authentication state can incorrectly be persisted across authentication attempts.
PriorityP349high7.5CVSS 3.1
AVNACLPRNUINSUCNIHAN
EPSS
0.14%
2.8th percentile
In sshd in OpenSSH before 10.6, GSSAPIAuthentication authentication state can incorrectly be persisted across authentication attempts.
Affected
6 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| openbsd | openssh | < 10.6 | 10.6 |
| openbsd | openssh | — | — |
| openshift | ose-rhel-coreos-8 | — | — |
| openshift | ose-rhel-coreos-9 | — | — |
| ubuntu | openssh | — | — |
| ubuntu | openssh-gssapi | — | — |
CVSS provenance
nvdv3.17.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
vendor_ubuntu6.5MEDIUM
vendor_redhat2.2LOW
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Ubuntu
OpenSSH vulnerabilities
vendor_ubuntu·2026-10-19·CVSS 6.5
CVE-2026-106553 [MEDIUM] OpenSSH vulnerabilities
Title: OpenSSH vulnerabilities
Summary: Several security issues were fixed in OpenSSH.
It was discovered that OpenSSH's sftp client incorrectly handled paths
returned by the server during a recursive copy operation. A remote attacker
controlling the server could possibly use this issue to write files to
unintended locations. (CVE-2026-106552)
It was discovered that OpenSSH's sshd server incorrectly handled
GSSAPIAuthentication state across authentication attempts. An attacker
could possibly use this issue to obtain credentials from a previous failed
authentication attempt. (CVE-2026-106553, CVE-2026-106555)
It was discovered that OpenSSH incorrectly used an LZ77 dictionary coder
during compression. An attacker could possibly use this issue to obtain
sensitive information. (CVE-2026-106
Ubuntu
OpenSSH vulnerabilities
vendor_ubuntu·2026-10-14·CVSS 6.5
CVE-2026-106552 [MEDIUM] OpenSSH vulnerabilities
Title: OpenSSH vulnerabilities
Summary: Several security issues were fixed in OpenSSH.
It was discovered that OpenSSH's sftp client incorrectly handled paths
returned by the server during a recursive copy operation. A remote
attacker controlling the server could possibly use this issue to write
files to unintended locations. (CVE-2026-106552)
It was discovered that OpenSSH's sshd server incorrectly handled
GSSAPIAuthentication state across authentication attempts. An attacker
could possibly use this issue to obtain credentials from a previous
failed authentication attempt. (CVE-2026-106553, CVE-2026-106555)
It was discovered that OpenSSH incorrectly used an LZ77 dictionary coder
during compression. An attacker could possibly use this issue to obtain
sensitive information. (CVE-2026-106
Red Hat
openssh: OpenSSH: Information disclosure via GSSAPI authentication state persistence
vendor_redhat·2026-10-06·CVSS 2.2
CVE-2026-106555 [LOW] CWE-488 openssh: OpenSSH: Information disclosure via GSSAPI authentication state persistence
openssh: OpenSSH: Information disclosure via GSSAPI authentication state persistence
In sshd in OpenSSH before 10.6, GSSAPIAuthentication authentication state can incorrectly be persisted across authentication attempts.
A flaw was found in OpenSSH's SSH daemon (sshd). When Generic Security Service Application Program Interface (GSSAPI) authentication is enabled, authentication state can improperly persist across separate authentication attempts. A local user could exploit this condition during sequential authentication sessions to access residual credentials from prior attempts, resulting in an information disclosure.
Statement: This vulnerability is rated as Low impact because exploitation is constrained to systems where GSSAPI authentication is explicitly enabled and yields only limit
GHSA
In sshd in OpenSSH before 10.6, GSSAPIAuthentication authentication state can incorrectly be persisted across authentication attempts.
ghsa_unreviewed·2026-10-06
CVE-2026-106555 [LOW] CWE-669 In sshd in OpenSSH before 10.6, GSSAPIAuthentication authentication state can incorrectly be persisted across authentication attempts.
In sshd in OpenSSH before 10.6, GSSAPIAuthentication authentication state can incorrectly be persisted across authentication attempts.
No detection rules found.
No public exploits indexed.
Bugzilla
CVE-2026-106555 openssh: OpenSSH: Information disclosure via GSSAPI authentication state persistence [fedora-all]
bugzilla·2026-10-09·CVSS 2.2
CVE-2026-106555 [LOW] CVE-2026-106555 openssh: OpenSSH: Information disclosure via GSSAPI authentication state persistence [fedora-all]
CVE-2026-106555 openssh: OpenSSH: Information disclosure via GSSAPI authentication state persistence [fedora-all]
Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.
In sshd in OpenSSH before 10.6, GSSAPIAuthentication authentication state can incorrectly be persisted across authentication attempts.
Bugzilla
CVE-2026-106555 openssh: OpenSSH: Information disclosure via GSSAPI authentication state persistence
bugzilla·2026-10-06·CVSS 2.2
CVE-2026-106555 [LOW] CVE-2026-106555 openssh: OpenSSH: Information disclosure via GSSAPI authentication state persistence
CVE-2026-106555 openssh: OpenSSH: Information disclosure via GSSAPI authentication state persistence
In sshd in OpenSSH before 10.6, GSSAPIAuthentication authentication state can incorrectly be persisted across authentication attempts.
2026-10-06
Published