CVE-2026-106586

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{"bugzilla": {"description": "openssh: OpenSSH: Security restriction bypass via unenforced restrict directive in tunnel forwarding", "id": "2547584", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2547584"}, "csaw": false, "cvss3": {"cvss3_base_score": "2.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:N", "status": "draft"}, "cwe": "CWE-267", "details": ["In sshd in OpenSSH before 10.6, the restrict keyword (in authorized_keys) was supposed to be applicable to tunnel forwarding but was not, a different vulnerability than CVE-2026-73283.", "A flaw was found in OpenSSH. In configurations where tunnel forwarding is enabled on the server, the restrict option in the authorized keys configuration fails to properly block tunnel forwarding requests. An authenticated user connecting with a restricted key can exploit this issue to bypass intended access limitations and establish unauthorized network tunnels through the server."], "name": "CVE-2026-106586", "package_state": [{"cpe": "cpe:/a:redhat:hummingbird:1", "fix_state": "Affected", "package_name": "openssh", "product_name": "Red Hat Hardened Images"}], "public_date": "2026-10-06T20:57:09Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-106586\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-106586\nhttps://www.openssh.org/releasenotes.html#10.6"], "threat_severity": "Low"}

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