CVE-2026-123158

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-123158
StatePUBLISHED
Assignermitre
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-11-05 16:17:47 UTC
Updated2026-11-05 21:18:45 UTC
Descriptionsshd 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.

Risk And Classification

Primary CVSS: v3.1 8.1 HIGH from [email protected]

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Problem Types: CWE-394 | CWE-394 CWE-394 Unexpected Status Code or Return Value

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary8.1HIGHCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
3.1CNACVSS8.1HIGHCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA OpenBSD OpenSSH affected 10.6p2 custom Linux

References

ReferenceSourceLinkTags
github.com/leonjza/sshhole-lab [email protected] github.com
news.ycombinator.com/item [email protected] news.ycombinator.com
news.ycombinator.com/item af854a3a-2127-422b-91ae-364da2661108 news.ycombinator.com
github.com/google/goonami-scanner/pull/277 af854a3a-2127-422b-91ae-364da2661108 github.com
github.com/openssh/openssh-portable/commit/4353fdc43ef646c43a8dda7025cc1... [email protected] github.com
hachyderm.io/@damienmiller/117563026759098135 [email protected] hachyderm.io
www.openssh.org/releasenotes.html [email protected] www.openssh.org
sshhole.com 134c704f-9b21-4f2e-91b3-4a467353bcc0 sshhole.com
alpinelinux.org/posts/2026-11-05-openssh-password-authentication-bypass af854a3a-2127-422b-91ae-364da2661108 alpinelinux.org
github.com/predkambrij/sshhole-repro [email protected] github.com
marc.info [email protected] marc.info
news.ycombinator.com/item [email protected] news.ycombinator.com
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