EUVD Vulnerability Catalog
Actively Exploited (KEV)
EUVD-2026-117552
Severity: HIGH
Base Score: 8.1
CVSS Version: 3.1
Vulnerability 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.
CVSS Vector Analysis
Below is the complete, human-readable breakdown of the CVSS metric string: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
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Attack Vector (AV): Network
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Attack Complexity (AC): High
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Privileges Required (PR): None
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User Interaction (UI): None
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Scope (S): Unchanged
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Confidentiality Impact (C): High
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Integrity Impact (I): High
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Availability Impact (A): High
Affected Vendors & Systems
Vendor
OpenBSD
References & Advisory Links
- https://www.openssh.org/releasenotes.html#10.6p2
- https://github.com/openssh/openssh-portable/commit/4353fdc43ef646c43a8dda7025cc1a898caf1482
- https://news.ycombinator.com/item?id=50377976
- https://news.ycombinator.com/item?id=50378228
- https://marc.info/?l=openssh-unix-dev&m=179388064263131&w=2
- https://hachyderm.io/@damienmiller/117563026759098135
- https://github.com/predkambrij/sshhole-repro
- https://github.com/leonjza/sshhole-lab
Metadata Profile
Database Authority
European Union Agency for Cybersecurity (ENISA) EUVD
Assigner
mitre
EPSS Probability
1.01
Known Aliases
GHSA-4fcc-vm97-gx3x
CVE-2026-123158
Published On
2026-11-05
Last Updated
2026-11-10
Exploited Since
2026-11-09