Description
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
CVSS 3.1 8.1/10
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:HWeakness enumeration
Affected software
| Vendor | Product | Versions |
|---|---|---|
| OpenBSD | OpenSSH | < 10.6p2 |
References
- https://github.com/leonjza/sshhole-labExploit, Third Party Advisory
- https://github.com/openssh/openssh-portable/commit/4353fdc43ef646c43a8dda7025cc1a898caf1482Patch
- https://github.com/predkambrij/sshhole-reproExploit, Third Party Advisory
- https://hachyderm.io/@damienmiller/117563026759098135Third Party Advisory
- https://marc.info/?l=openssh-unix-dev&m=179388064263131&w=2Mailing List, Vendor Advisory
- https://news.ycombinator.com/item?id=50377976Issue Tracking
- https://news.ycombinator.com/item?id=50378228Issue Tracking
- https://www.openssh.org/releasenotes.html#10.6p2Release Notes
- http://www.openwall.com/lists/oss-security/2026/11/09/27Mailing List
- https://alpinelinux.org/posts/2026-11-05-openssh-password-authentication-bypass/Third Party Advisory
- https://github.com/coollabsio/coolify/discussions/12484Third Party Advisory
- https://github.com/google/goonami-scanner/pull/277Third Party Advisory
- https://github.com/panubo/docker-sshd/issues/93Third Party Advisory
- https://news.ycombinator.com/item?id=50379704Issue Tracking
- https://isc.sans.edu/diary.html?storyid=33498Not Applicable
- https://sshhole.comThird Party Advisory
- https://sshole.events.greynoise.io/Third Party Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-123158US Government Resource
Timeline
- Published
- Nov 5, 2026
- Last modified
- Nov 10, 2026
- Added to CISA KEV
- Nov 9, 2026
- NVD status
- Analyzed