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.
Package Versions Affected
Automatically patch vulnerabilities without upgrading
CVSS Version
Related Resources
References
http://www.openwall.com/lists/oss-security/2026/11/09/27, https://alpinelinux.org/posts/2026-11-05-openssh-password-authentication-bypass/, https://github.com/coollabsio/coolify/discussions/12484, https://hachyderm.io/@damienmiller/117563026759098135, https://marc.info/?l=openssh-unix-dev&m=179388064263131&w=2, https://news.ycombinator.com/item?id=50377976, https://news.ycombinator.com/item?id=50378228, https://news.ycombinator.com/item?id=50379704, https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-123158, https://www.openssh.org/releasenotes.html#10.6p2, https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/123xxx/CVE-2026-123158.json, https://isc.sans.edu/diary.html?storyid=33498, https://nvd.nist.gov/vuln/detail/CVE-2026-123158, https://sshole.events.greynoise.io/, https://github.com/panubo/docker-sshd/issues/93, https://github.com/google/goonami-scanner/pull/277, https://github.com/openssh/openssh-portable/commit/4353fdc43ef646c43a8dda7025cc1a898caf1482, https://github.com/leonjza/sshhole-lab, https://github.com/predkambrij/sshhole-repro, https://sshhole.com