CVE-2026-123158
highsshd in OpenSSH before 10.6p2 on Linux, when musl libc is used without PAM, lacks a workaround for a password authentication bypass (related to misinterpretati…
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.
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H Affected products
Not reported by the source (unknown — not "none").
Weakness classification (CWE)
Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.
Mitigation & advisories
No vendor advisory or patch reference tagged by NVD. Check the references below.
References
- https://github.com/leonjza/sshhole-lab cve@mitre.org
- https://github.com/openssh/openssh-portable/commit/4353fdc43ef646c43a8dda7025cc1a898caf148... cve@mitre.org
- https://github.com/predkambrij/sshhole-repro cve@mitre.org
- https://hachyderm.io/@damienmiller/117563026759098135 cve@mitre.org
- https://marc.info/?l=openssh-unix-dev&m=179388064263131&w=2 cve@mitre.org
- https://news.ycombinator.com/item?id=50377976 cve@mitre.org
- https://news.ycombinator.com/item?id=50378228 cve@mitre.org
- https://www.openssh.org/releasenotes.html#10.6p2 cve@mitre.org
- https://alpinelinux.org/posts/2026-11-05-openssh-password-authentication-bypass/ af854a3a-2127-422b-91ae-364da2661108
- https://github.com/google/goonami-scanner/pull/277 af854a3a-2127-422b-91ae-364da2661108
- https://news.ycombinator.com/item?id=50379704 af854a3a-2127-422b-91ae-364da2661108
- https://sshhole.com 134c704f-9b21-4f2e-91b3-4a467353bcc0