CVE-2026-59851

A flaw was found in libssh. On servers with GSSAPIKeyExchange enabled, the gssapi-keyex path does not verify whether the authenticated Kerberos principal is authorized for the requested local user, allowing authenticated clients to log in as arbitrary users...

CVE-2026-59851: Incorrect Authorization

A flaw was found in libssh. On servers with GSSAPIKeyExchange enabled, the gssapi-keyex path does not verify whether the authenticated Kerberos principal is authorized for the requested local user, allowing authenticated clients to log in as arbitrary users...

openssh security update

9.9p1-23.0.1 - Upstream references found with /usr/bin/ssh Orabug: 37824421 9.9p1-23 - CVE-2026-35385: Fix privilege escalation via scp legacy protocol when not in preserving file mode Resolves: RHEL-164739 - CVE-2026-35388: Add connection multiplexing confirmation for proxy-mode multiplexing...

openssh security update

9.9p1-7.0.2 - Replace unsupported ML-KEM hybrid algorithm skip logic with v9.9p1-23.el102 ML-KEM/NIST backport Orabug: 39423076 9.9p1-7.0.1 - Upstream references found with /usr/bin/ssh Orabug: 37814929 9.9p1-7 + 0.10.4-9 - Version bump 9.9p1-5 + 0.10.4-8 - CVE-2026-3497: Fix information disclosu...

Oracle Linux 9 : openssh (ELSA-2026-6462)

The remote Oracle Linux 9 host has packages installed that are affected by a vulnerability as referenced in the ELSA-2026-6462 advisory. 8.7p1-48.0.1 - Upstream references found with /usr/bin/ssh Orabug: 37814929 - upstream: fix AuthorizedPrincipalsCommand when AuthorizedKeysCommand Orabug:...

openssh security update

8.7p1-48.0.1 - Upstream references found with /usr/bin/ssh Orabug: 37814929 - upstream: fix AuthorizedPrincipalsCommand when AuthorizedKeysCommand Orabug: 37647064 - Update upstream references Orabug: 36564626 8.7p1-48 - CVE-2026-3497: Fix information disclosure or denial of service due to...

openssh security update

9.9p1-13.0.1 - Upstream references found with /usr/bin/ssh Orabug: 37824421 9.9p1-13 - CVE-2026-3497: Fix information disclosure or denial of service due to uninitialized variables in gssapi-keyex Resolves: RHEL-155811...

CentOS 9 : openssh-9.9p1-7.el9

The remote CentOS Linux 9 host has packages installed that are affected by a vulnerability as referenced in the openssh-9.9p1-7.el9 build changelog. - Fix information disclosure or denial of service due to uninitialized variables in gssapi-keyex CVE-2026-3497 Note that Nessus has not tested for...

Fedora: Security Advisory (FEDORA-2026-39819a3d62)

The remote host is missing an update for the SPDX-FileCopyrightText: 2026 Greenbone AG Some text descriptions might be excerpted from a referenced sources, and are Copyright C by the respective right holders. SPDX-License-Identifier: GPL-2.0-only ifdescription...

CentOS 9 : openssh-9.9p1-5.el9

The remote CentOS Linux 9 host has packages installed that are affected by a vulnerability as referenced in the openssh-9.9p1-5.el9 build changelog. - Fix information disclosure or denial of service due to uninitialized variables in gssapi-keyex CVE-2026-3497 Note that Nessus has not tested for...

Fedora 44 : openssh (2026-62fb46caac)

The remote Fedora 44 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2026-62fb46caac advisory. - CVE-2026-3497: Fix information disclosure or denial of service due to uninitialized variables in gssapi- keyex Tenable has extracted the preceding...

Fedora 42 : openssh (2026-39819a3d62)

The remote Fedora 42 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2026-39819a3d62 advisory. - CVE-2026-3497: Fix information disclosure or denial of service due to uninitialized variables in gssapi- keyex Tenable has extracted the preceding...

Fedora 43 : openssh (2026-bab4aa5da7)

The remote Fedora 43 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2026-bab4aa5da7 advisory. - CVE-2026-3497: Fix information disclosure or denial of service due to uninitialized variables in gssapi- keyex Tenable has extracted the preceding...

Man In The Middle (MitM)

paramiko is vulnerable to man-in-the-middle MitM attacks. These attacks are possible on the ssh client when gsskey=True, the server doesnt support gssapi-keyex and doesnt give any or no host key...

Man In The Middle (MitM)

paramiko is vulnerable to man-in-the-middle MitM attacks. These attacks are possible on the ssh client when gsskey=True, the server doesn't support gssapi-keyex and doesn't give any or no host key...