openssh, openssh-gssapi vulnerabilities
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-2026-106582) It was discovered that OpenSSH's ssh client incorrectly allowed special characters in command-line usernames. An attacker could possibly use this issue to inject arbitrary commands via specially crafted usernames. (CVE-2026-106583) It was discovered that OpenSSH's ssh-keygen incorrectly handled Daylight Saving Time when converting dates. An attacker could possibly use this issue to cause certificates to have incorrect expiration times. (CVE-2026-106584) It was discovered that OpenSSH did not check whether the maximum packet length was exceeded during decompression. A remote attacker could possibly use this issue to cause a denial of service. (CVE-2026-106585) It was discovered that OpenSSH's sshd server incorrectly applied the restrict keyword from authorized_keys to tunnel f
- Products
- openssh, openssh-gssapi
- Affected versions
- 1:10.2p1-2ubuntu3, 1:10.3p1-4ubuntu1, 1:10.3p1-4ubuntu2, 1:10.5p1-1ubuntu1, 1:10.5p1-1ubuntu2, 1:10.5p1-1ubuntu3
- Fixed versions
- 1:10.5p1-1ubuntu3.1
- CVEs
- CVE-2026-106552, CVE-2026-106553, CVE-2026-106555, CVE-2026-106582, CVE-2026-106583, CVE-2026-106584, CVE-2026-106585, CVE-2026-106586, CVE-2026-106587
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 08:45 UTC · Revision 1
Source evidence
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-2026-106582) It was discovered that OpenSSH's ssh client incorrectly allowed special characters in command-line usernames. An attacker could possibly use this issue to inject arbitrary commands via specially crafted usernames. (CVE-2026-106583) It was discovered that OpenSSH's ssh-keygen incorrectly handled Daylight Saving Time when converting dates. An attacker could possibly use this issue to cause certificates to have incorrect expiration times. (CVE-2026-106584) It was discovered that OpenSSH did not check whether the maximum packet length was exceeded during decompression. A remote attacker could possibly use this issue to cause a denial of service. (CVE-2026-106585) It was discovered that OpenSSH's sshd server incorrectly applied the restrict keyword from authorized_keys to tunnel f
osv:USN-8937-1
openssh
Fixed versions: 1:10.5p1-1ubuntu3.1
openssh-gssapi
Fixed versions: 1:10.5p1-1ubuntu3.1
Complete source record
{
"id": "485061b7b2ce4e62d1ea8262868dc4bb20e9005ffb51d26e5d1f26e36d68737f",
"url": "https://osv.dev/vulnerability/USN-8937-1",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "openssh, openssh-gssapi vulnerabilities",
"summary": "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-2026-106582) It was discovered that OpenSSH's ssh client incorrectly allowed special characters in command-line usernames. An attacker could possibly use this issue to inject arbitrary commands via specially crafted usernames. (CVE-2026-106583) It was discovered that OpenSSH's ssh-keygen incorrectly handled Daylight Saving Time when converting dates. An attacker could possibly use this issue to cause certificates to have incorrect expiration times. (CVE-2026-106584) It was discovered that OpenSSH did not check whether the maximum packet length was exceeded during decompression. A remote attacker could possibly use this issue to cause a denial of service. (CVE-2026-106585) It was discovered that OpenSSH's sshd server incorrectly applied the restrict keyword from authorized_keys to tunnel f",
"evidence": "osv:USN-8937-1",
"products": [
{
"name": {
"value": "openssh",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "1:10.5p1-1ubuntu3.1",
"evidence": "/affected/0/ranges"
}
],
"affected_versions": [
{
"value": "1:10.2p1-2ubuntu3",
"evidence": "/affected/0/versions"
},
{
"value": "1:10.3p1-4ubuntu1",
"evidence": "/affected/0/versions"
},
{
"value": "1:10.3p1-4ubuntu2",
"evidence": "/affected/0/versions"
},
{
"value": "1:10.5p1-1ubuntu2",
"evidence": "/affected/0/versions"
}
]
},
{
"name": {
"value": "openssh-gssapi",
"evidence": "/affected/1/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "1:10.5p1-1ubuntu3.1",
"evidence": "/affected/1/ranges"
}
],
"affected_versions": [
{
"value": "1:10.5p1-1ubuntu1",
"evidence": "/affected/1/versions"
},
{
"value": "1:10.5p1-1ubuntu2",
"evidence": "/affected/1/versions"
},
{
"value": "1:10.5p1-1ubuntu3",
"evidence": "/affected/1/versions"
}
]
}
],
"severity": "unknown",
"structured": {
"id": "USN-8937-1",
"aliases": [
"USN-8937-1"
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "1:10.5p1-1ubuntu3.1"
}
]
}
],
"package": {
"name": "openssh",
"purl": "pkg:deb/ubuntu/openssh?arch=source&distro=stonking",
"ecosystem": "Ubuntu:26.10"
},
"versions": [
"1:10.2p1-2ubuntu3",
"1:10.3p1-4ubuntu1",
"1:10.3p1-4ubuntu2",
"1:10.5p1-1ubuntu2"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8937-1.json",
"cves_map": {
"cves": [
{
"id": "CVE-2026-106552",
"severity": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:L"
},
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N"
},
{
"type": "Ubuntu",
"score": "medium"
}
]
},
{
"id": "CVE-2026-106553",
"severity": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:L/I:N/A:N"
},
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N"
},
{
"type": "Ubuntu",
"score": "medium"
}
]
},
{
"id": "CVE-2026-106555",
"severity": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:L/I:N/A:N"
},
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N"
},
{
"type": "Ubuntu",
"score": "medium"
}
]
},
{
"id": "CVE-2026-106582",
"severity": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N"
},
{
"type": "Ubuntu",
"score": "medium"
}
]
},
{
"id": "CVE-2026-106583",
"severity": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:N"
},
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H"
},
{
"type": "Ubuntu",
"score": "medium"
}
]
},
{
"id": "CVE-2026-106584",
"severity": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:N"
},
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N"
},
{
"type": "Ubuntu",
"score": "medium"
}
]
},
{
"id": "CVE-2026-106585",
"severity": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L"
},
{
"type": "Ubuntu",
"score": "medium"
}
]
},
{
"id": "CVE-2026-106586",
"severity": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:N"
},
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N"
},
{
"type": "Ubuntu",
"score": "medium"
}
]
},
{
"id": "CVE-2026-106587",
"severity": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:L"
},
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N"
},
{
"type": "Ubuntu",
"score": "medium"
}
]
}
],
"ecosystem": "Ubuntu:26.10"
}
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "openssh-client",
"binary_version": "1:10.5p1-1ubuntu3.1"
},
{
"binary_name": "openssh-common",
"binary_version": "1:10.5p1-1ubuntu3.1"
},
{
"binary_name": "openssh-server",
"binary_version": "1:10.5p1-1ubuntu3.1"
},
{
"binary_name": "openssh-sftp-server",
"binary_version": "1:10.5p1-1ubuntu3.1"
},
{
"binary_name": "openssh-tests",
"binary_version": "1:10.5p1-1ubuntu3.1"
},
{
"binary_name": "ssh",
"binary_version": "1:10.5p1-1ubuntu3.1"
},
{
"binary_name": "ssh-askpass-gnome",
"binary_version": "1:10.5p1-1ubuntu3.1"
}
],
"availability": "No subscription required"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "1:10.5p1-1ubuntu3.1"
}
]
}
],
"package": {
"name": "openssh-gssapi",
"purl": "pkg:deb/ubuntu/openssh-gssapi?arch=source&distro=stonking",
"ecosystem": "Ubuntu:26.10"
},
"versions": [
"1:10.5p1-1ubuntu1",
"1:10.5p1-1ubuntu2",
"1:10.5p1-1ubuntu3"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8937-1.json",
"cves_map": {
"cves": [
{
"id": "CVE-2026-106552",
"severity": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:L"
},
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N"
},
{
"type": "Ubuntu",
"score": "medium"
}
]
},
{
"id": "CVE-2026-106553",
"severity": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:L/I:N/A:N"
},
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N"
},
{
"type": "Ubuntu",
"score": "medium"
}
]
},
{
"id": "CVE-2026-106555",
"severity": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:L/I:N/A:N"
},
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N"
},
{
"type": "Ubuntu",
"score": "medium"
}
]
},
{
"id": "CVE-2026-106582",
"severity": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N"
},
{
"type": "Ubuntu",
"score": "medium"
}
]
},
{
"id": "CVE-2026-106583",
"severity": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:N"
},
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H"
},
{
"type": "Ubuntu",
"score": "medium"
}
]
},
{
"id": "CVE-2026-106584",
"severity": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:N"
},
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N"
},
{
"type": "Ubuntu",
"score": "medium"
}
]
},
{
"id": "CVE-2026-106585",
"severity": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L"
},
{
"type": "Ubuntu",
"score": "medium"
}
]
},
{
"id": "CVE-2026-106586",
"severity": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:N"
},
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N"
},
{
"type": "Ubuntu",
"score": "medium"
}
]
},
{
"id": "CVE-2026-106587",
"severity": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:L"
},
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N"
},
{
"type": "Ubuntu",
"score": "medium"
}
]
}
],
"ecosystem": "Ubuntu:26.10"
}
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "openssh-client-gssapi",
"binary_version": "1:10.5p1-1ubuntu3.1"
},
{
"binary_name": "openssh-server-gssapi",
"binary_version": "1:10.5p1-1ubuntu3.1"
}
],
"availability": "No subscription required"
}
}
],
"modified": "2026-10-19T23:43:21.200850366Z",
"provider": "osv",
"upstream": [
"CVE-2026-106552",
"CVE-2026-106553",
"CVE-2026-106555",
"CVE-2026-106582",
"CVE-2026-106583",
"CVE-2026-106584",
"CVE-2026-106585",
"CVE-2026-106586",
"CVE-2026-106587",
"UBUNTU-CVE-2026-106552",
"UBUNTU-CVE-2026-106553",
"UBUNTU-CVE-2026-106555",
"UBUNTU-CVE-2026-106582",
"UBUNTU-CVE-2026-106583",
"UBUNTU-CVE-2026-106584",
"UBUNTU-CVE-2026-106585",
"UBUNTU-CVE-2026-106586",
"UBUNTU-CVE-2026-106587"
],
"references": [
"https://ubuntu.com/security/notices/USN-8937-1",
"https://ubuntu.com/security/CVE-2026-106552",
"https://ubuntu.com/security/CVE-2026-106553",
"https://ubuntu.com/security/CVE-2026-106555",
"https://ubuntu.com/security/CVE-2026-106582",
"https://ubuntu.com/security/CVE-2026-106583",
"https://ubuntu.com/security/CVE-2026-106584",
"https://ubuntu.com/security/CVE-2026-106585",
"https://ubuntu.com/security/CVE-2026-106586",
"https://ubuntu.com/security/CVE-2026-106587"
]
},
"related_cves": [
{
"value": "CVE-2026-106552",
"evidence": "/upstream"
},
{
"value": "CVE-2026-106553",
"evidence": "/upstream"
},
{
"value": "CVE-2026-106555",
"evidence": "/upstream"
},
{
"value": "CVE-2026-106582",
"evidence": "/upstream"
},
{
"value": "CVE-2026-106583",
"evidence": "/upstream"
},
{
"value": "CVE-2026-106584",
"evidence": "/upstream"
},
{
"value": "CVE-2026-106585",
"evidence": "/upstream"
},
{
"value": "CVE-2026-106586",
"evidence": "/upstream"
},
{
"value": "CVE-2026-106587",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": null
},
"source_id": "core-osv",
"document_id": 376854,
"published_at": "2026-10-19T13:34:39+00:00"
}