CVE-2026-123158
CVSS Score
8.1
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-394 |
| Vendor | openbsd |
| Product | openssh |
| Ecosystems | |
| Industries | Technology |
| Published | Nov 5, 2026 |
| Last Updated | Nov 6, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
Affected Versions
OpenBSD / OpenSSH
0 < 10.6p2
References
openssh.org: https://www.openssh.org/releasenotes.html#10.6p2 github.com: https://github.com/openssh/openssh-portable/commit/4353fdc43ef646c43a8dda7025cc1a898caf1482 news.ycombinator.com: https://news.ycombinator.com/item?id=50377976 news.ycombinator.com: https://news.ycombinator.com/item?id=50378228 marc.info: https://marc.info/?l=openssh-unix-dev&m=179388064263131&w=2 hachyderm.io: https://hachyderm.io/@damienmiller/117563026759098135 github.com: https://github.com/predkambrij/sshhole-repro github.com: https://github.com/leonjza/sshhole-lab alpinelinux.org: https://alpinelinux.org/posts/2026-11-05-openssh-password-authentication-bypass/ news.ycombinator.com: https://news.ycombinator.com/item?id=50379704 github.com: https://github.com/google/goonami-scanner/pull/277 sshhole.com: https://sshhole.com