# CVE-2026-123158

OpenSSH sshd auth bypass on musl builds allows long-password logins

- Page: https://www.vulneraibility.com/cve/CVE-2026-123158
- CVSS: 8.1
- Known exploited: not in CISA KEV as of our last sync
- CISA SSVC: exploitation poc, automatable no, technical impact total (assessed 2026-11-05)
- Weakness: CWE-394
- Published: 2026-11-05

## Affected versions

- OpenBSD OpenSSH: affected < 10.6p2

A version outside these ranges is not a statement that it is unaffected.

## Impact

Remote authentication bypass: 256–1024 char passwords authenticate successfully, enabling unauthorized SSH access and lateral movement.

## Action

Immediate action required

## Recommendation

Upgrade OpenSSH to 10.6p2+ or apply vendor patches; rebuild musl images with patched OpenSSH.

## References

- [other] https://www.openssh.org/releasenotes.html#10.6p2
- [other] https://github.com/openssh/openssh-portable/commit/4353fdc43ef646c43a8dda7025cc1a898caf1482
- [other] https://news.ycombinator.com/item?id=50377976
- [other] https://news.ycombinator.com/item?id=50378228
- [other] https://marc.info/?l=openssh-unix-dev&m=179388064263131&w=2
- [other] https://hachyderm.io/@damienmiller/117563026759098135
- [other] https://github.com/predkambrij/sshhole-repro
- [other] https://github.com/leonjza/sshhole-lab
- [other] https://alpinelinux.org/posts/2026-11-05-openssh-password-authentication-bypass/
- [other] https://news.ycombinator.com/item?id=50379704
- [other] https://github.com/google/goonami-scanner/pull/277
- [exploit] https://sshhole.com

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Summary, impact and action are written by the vulneraibility.com AI analysis pipeline from the CVE record, NVD, CISA and FIRST data; verify against the references.