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8.1Hoch KEV

CVE-2026-123158OpenBSD OpenSSH Unexpected Status Code or Return Value Vulnerability

OpenBSD OpenSSH Veröffentlicht: (vor 8 Tagen)

Bekannt ausgenutzt — OpenBSD OpenSSH Unexpected Status Code or Return Value Vulnerability

CISA hat am 09.11.2026 bestätigt, dass diese Schwachstelle in echten Angriffen genutzt wird. Frist für US-Bundesbehörden: 12.11.2026.

Erforderliche Maßnahme: Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines. This vulnerability affects an open-source component, third-party library, protocol, or proprietary implementation that could be used by different products. For more information, please see: https://www.openssh.org/releasenotes.html ; https://alpinelinux.org/posts/2026-11-05-openssh-password-authentication-bypass/ ; https://github.com/openssh/openssh-portable/commit/4353fdc43ef646c43a8dda7025cc1a898caf1482 ; BOD 26-04: https://www.cisa.gov/news-events/directives/bod-26-04-prioritizing-security-updates-based-risk ; Forensics Triage Requirements: https://www.cisa.gov/news-events/directives/bod-26-04-implementation-guidance-prioritizing-security-updates-based-risk ; https://nvd.nist.gov/vuln/detail/CVE-2026-123158

Beschreibung

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.

Schwachstellentyp (CWE): CWE-394

Daten: CVE.org, NVD, CISA KEV, FIRST EPSS, Ubuntu. Wiedergegeben wie in der Quelle, auf Englisch.

Betroffene Produkte und Versionen

HerstellerProduktVersionen
OpenBSD OpenSSH < 10.6p2

Referenzen und Patches

CPE-Treffer (NVD) (3)
  • cpe:2.3:a:openbsd:openssh:*:*:*:*:*:*:*:* < 10.6
  • cpe:2.3:a:openbsd:openssh:10.6:-:*:*:*:*:*:*
  • cpe:2.3:a:openbsd:openssh:10.6:p1:*:*:*:*:*:*

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