CVE-2026-123158
sshd in OpenSSH before 10.6p2 on Linux, when musl libc is used without PAM, lacks a workaround for…
- Risk score
- 64/100
- CVSS
- 8.1 v3.1
- Published
- 5 Nov 2026
Open in the live forecast Today's forecast
What to know
- What it is
- 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 exampl…
- Affected
- See advisory
- Fix
- Upgrade the product to 10.6 or later.
- Exploitation
- No known exploitation
Why it is Amber
- CVSS 8.1 high
- Remotely exploitable without logging in
- On your watchlist: openssh
References
- https://github.com/leonjza/sshhole-lab
- https://github.com/openssh/openssh-portable/commit/4353fdc43ef646c43a8dda7025cc1a898caf1482
- https://github.com/predkambrij/sshhole-repro
- 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://www.openssh.org/releasenotes.html#10.6p2
- https://alpinelinux.org/posts/2026-11-05-openssh-password-authentication-bypass/
- https://news.ycombinator.com/item?id=50379704
Original 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.
Last activity 5 Nov 2026. Patch Forecast updates every hour.