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CVE-2026-123158
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.
8.1 HIGHEPSS 0.97%Not in KEVNVD: Received
Overview
Severity
| Score | Severity | Version | Vector String |
|---|---|---|---|
| 8.1 | HIGH | 3.1mitre (CNA) | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H |
Details
- CVE ID
- CVE-2026-123158
- Status
- Received
- Assigner (CNA)
- mitre
- Published
- Nov 5, 2026
- Last modified
- 2026-11-08 03:16 UTC
- Weaknesses
- CWE-394 · Unexpected Status Code or Return Value
Affected Products
As published by the CNA in the CVE record.
OpenBSDOpenSSH1 version range
- before 10.6p2
References
- github.com https://github.com/leonjza/sshhole-lab
- github.com https://github.com/openssh/openssh-portable/commit/4353fdc43ef646c43a8dda7025cc1a898caf1482
- github.com https://github.com/predkambrij/sshhole-repro
- hachyderm.io https://hachyderm.io/@damienmiller/117563026759098135
- marc.info https://marc.info/?l=openssh-unix-dev&m=179388064263131&w=2
- news.ycombinator.com https://news.ycombinator.com/item?id=50377976
- news.ycombinator.com https://news.ycombinator.com/item?id=50378228
- openssh.org https://www.openssh.org/releasenotes.html#10.6p2
- alpinelinux.org https://alpinelinux.org/posts/2026-11-05-openssh-password-authentication-bypass/
- github.com https://github.com/coollabsio/coolify/discussions/12484
- github.com https://github.com/google/goonami-scanner/pull/277
- github.com https://github.com/panubo/docker-sshd/issues/93
- news.ycombinator.com https://news.ycombinator.com/item?id=50379704
- sshhole.com https://sshhole.com