{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-123158", "assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca", "state": "PUBLISHED", "assignerShortName": "mitre", "dateReserved": "2026-11-05T15:46:25.881Z", "datePublished": "2026-11-05T15:46:26.488Z", "dateUpdated": "2026-11-06T04:56:35.243Z"}, "containers": {"cna": {"affected": [{"defaultStatus": "unaffected", "platforms": ["Linux"], "product": "OpenSSH", "vendor": "OpenBSD", "versions": [{"lessThan": "10.6p2", "status": "affected", "version": "0", "versionType": "custom"}]}], "descriptions": [{"lang": "en", "value": "sshd in OpenSSH before 10.6p2 on Linux, when musl libc is used without PAM, lacks a workaround for a password authentication bypass (related to misinterpretation of whether a string is intended to be a password hash). For some configurations of accounts, any password between 256 and 1024 characters succeeds. An example of a platform using musl libc without PAM is Alpine Linux."}], "metrics": [{"cvssV3_1": {"attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 8.1, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}]}], "problemTypes": [{"descriptions": [{"cweId": "CWE-394", "description": "CWE-394 Unexpected Status Code or Return Value", "lang": "en", "type": "CWE"}]}], "providerMetadata": {"orgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca", "shortName": "mitre", "dateUpdated": "2026-11-05T15:46:26.488Z"}, "references": [{"url": "https://www.openssh.org/releasenotes.html#10.6p2"}, {"url": "https://github.com/openssh/openssh-portable/commit/4353fdc43ef646c43a8dda7025cc1a898caf1482"}, {"url": "https://news.ycombinator.com/item?id=50377976"}, {"url": "https://news.ycombinator.com/item?id=50378228"}, {"url": "https://marc.info/?l=openssh-unix-dev&m=179388064263131&w=2"}, {"url": "https://hachyderm.io/@damienmiller/117563026759098135"}, {"url": "https://github.com/predkambrij/sshhole-repro"}, {"url": "https://github.com/leonjza/sshhole-lab"}], "x_generator": {"engine": "CVE-Request-form 0.0.1"}, "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:openbsd:openssh:*:*:*:*:*:*:*:*", "versionEndExcluding": "10.6p2"}]}]}]}, "adp": [{"providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2026-11-05T21:06:39.062Z"}, "references": [{"url": "https://alpinelinux.org/posts/2026-11-05-openssh-password-authentication-bypass/"}, {"url": "https://news.ycombinator.com/item?id=50379704"}, {"url": "https://github.com/google/goonami-scanner/pull/277"}], "title": "CVE Program Container", "x_generator": {"engine": "ADPogram 0.0.1"}}, {"references": [{"url": "https://sshhole.com", "tags": ["exploit"]}], "metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-11-05T00:00:00+00:00", "options": [{"Exploitation": "poc"}, {"Automatable": "no"}, {"Technical Impact": "total"}], "role": "CISA Coordinator", "version": "2.0.3", "id": "CVE-2026-123158"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-11-06T04:56:35.243Z"}}]}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "platforms": ["Linux"], "product": "OpenSSH", "vendor": "OpenBSD", "versions": [{"lessThan": "10.6p2", "status": "affected", "version": "0", "versionType": "custom"}]}], "source": "cve@mitre.org"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "sshd in OpenSSH before 10.6p2 on Linux, when musl libc is used without PAM, lacks a workaround for a password authentication bypass (related to misinterpretation of whether a string is intended to be a password hash). For some configurations of accounts, any password between 256 and 1024 characters succeeds. An example of a platform using musl libc without PAM is Alpine Linux."}], "id": "CVE-2026-123158", "lastModified": "2026-11-06T05:18:26.710", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 8.1, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 2.2, "impactScore": 5.9, "source": "cve@mitre.org", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-123158", "options": [{"exploitation": "poc"}, {"automatable": "no"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-11-05T00:00:00+00:00", "version": "2.0.3"}}]}, "published": "2026-11-05T16:17:47.110", "references": [{"source": "cve@mitre.org", "url": "https://github.com/leonjza/sshhole-lab"}, {"source": "cve@mitre.org", "url": "https://github.com/openssh/openssh-portable/commit/4353fdc43ef646c43a8dda7025cc1a898caf1482"}, {"source": "cve@mitre.org", "url": "https://github.com/predkambrij/sshhole-repro"}, {"source": "cve@mitre.org", "url": "https://hachyderm.io/@damienmiller/117563026759098135"}, {"source": "cve@mitre.org", "url": "https://marc.info/?l=openssh-unix-dev&m=179388064263131&w=2"}, {"source": "cve@mitre.org", "url": "https://news.ycombinator.com/item?id=50377976"}, {"source": "cve@mitre.org", "url": "https://news.ycombinator.com/item?id=50378228"}, {"source": "cve@mitre.org", "url": "https://www.openssh.org/releasenotes.html#10.6p2"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://alpinelinux.org/posts/2026-11-05-openssh-password-authentication-bypass/"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://github.com/google/goonami-scanner/pull/277"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://news.ycombinator.com/item?id=50379704"}, {"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "url": "https://sshhole.com"}], "sourceIdentifier": "cve@mitre.org", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-394"}], "source": "cve@mitre.org", "type": "Secondary"}]}

{"bugzilla": {"description": "openssh: OpenSSH: Password authentication bypass via password hash misinterpretation", "id": "2567690", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2567690"}, "csaw": false, "cvss3": {"cvss3_base_score": "8.1", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H", "status": "draft"}, "cwe": "CWE-303", "details": ["A flaw was found in OpenSSH. When running on Linux systems utilizing the musl standard C library without Pluggable Authentication Modules (PAM), the SSH server can misinterpret input strings as password hashes. A remote, unauthenticated attacker can exploit this flaw by submitting a specially sized password, bypassing password authentication and gaining unauthorized access to affected accounts."], "mitigation": {"lang": "en:us", "value": "Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability."}, "name": "CVE-2026-123158", "package_state": [{"cpe": "cpe:/a:redhat:enterprise_linux:10", "fix_state": "Not affected", "package_name": "openssh", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:rhel_els:6", "fix_state": "Not affected", "package_name": "openssh", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:rhel_els:7", "fix_state": "Not affected", "package_name": "openssh", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/a:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "openssh", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/a:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "openssh", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/a:redhat:hummingbird:1", "fix_state": "Not affected", "package_name": "openshell", "product_name": "Red Hat Hardened Images"}, {"cpe": "cpe:/a:redhat:hummingbird:1", "fix_state": "Not affected", "package_name": "openssh", "product_name": "Red Hat Hardened Images"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Not affected", "package_name": "openshift/ose-rhel-coreos-8", "product_name": "Red Hat OpenShift Container Platform 4"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Not affected", "package_name": "openshift/ose-rhel-coreos-9", "product_name": "Red Hat OpenShift Container Platform 4"}, {"cpe": "cpe:/a:redhat:openshift:5", "fix_state": "Not affected", "package_name": "openshift/ose-rhel-coreos-9", "product_name": "Red Hat OpenShift Container Platform 5"}], "public_date": "2026-11-05T15:46:26Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-123158\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-123158\nhttps://alpinelinux.org/posts/2026-11-05-openssh-password-authentication-bypass/\nhttps://github.com/google/goonami-scanner/pull/277\nhttps://github.com/leonjza/sshhole-lab\nhttps://github.com/openssh/openssh-portable/commit/4353fdc43ef646c43a8dda7025cc1a898caf1482\nhttps://github.com/predkambrij/sshhole-repro\nhttps://hachyderm.io/@damienmiller/117563026759098135\nhttps://marc.info/?l=openssh-unix-dev&m=179388064263131&w=2\nhttps://news.ycombinator.com/item?id=50377976\nhttps://news.ycombinator.com/item?id=50378228\nhttps://news.ycombinator.com/item?id=50379704\nhttps://sshhole.com\nhttps://www.openssh.org/releasenotes.html#10.6p2"], "statement": "Red Hat products are not affected by this vulnerability. This issue specifically requires OpenSSH to be compiled and executed against the musl C library (musl libc) without PAM enabled. Red Hat Enterprise Linux and all Red Hat product builds link OpenSSH against the GNU C Library (glibc) and use PAM by default.", "threat_severity": "Important"}

{"affected": [{"configurations": [{"platform": ["linux"], "status": "affected", "versions": {"scheme": "generic", "value": "[0,10.6p2)"}}], "enrichment": {"confidence": 95.0, "confidence_source": "inferred", "scores": [{"score": 95.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "OpenSSH", "source": "cna", "vendor": "OpenBSD"}, "product": "openssh", "vendor": "openbsd"}], "created": "2026-11-05T17:45:06.313238+00:00", "updated": "2026-11-06T15:00:08.000696+00:00", "vendors": ["openbsd", "openbsd$PRODUCT$openssh"]}