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Public proof of conceptAwaiting NVD analysis

CVE-2026-123158

A public proof of concept exists; no exploitation attested.

  • Published2026-11-05
  • WeaknessCWE-394

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

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.

Timeline

dates in UTC
  1. 2026-11-0515:46CVE publishedCNA

Versions per branch

Products declared by the CNA

As mitre, the CNA that assigned this CVE, declared them in the CVE record; versions as written. NVD lists no product for this CVE yet: this is the only product data so far.

  • OpenBSD OpenSSHother versions: not affected

    platforms: Linux

    Affected
    • < 10.6p2fixed in 10.6p2custom

Source: the CNA record (CVE Program), © The MITRE Corporation,CVE Terms of UseCVE recordupdated 2026-11-05

Neither OSV.dev nor the vendor advisories we read list affected versions for CVE-2026-123158 yet.

Full record on NVD

Fix

No fix published by the sources we read yet. NVD record

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof of concept
Metasploit modules
none listed
Metasploit Framework

Sources

  • NVDCVE recordread 2026-11-05
  • CISA-ADPSSVC decisionpoc2026-11-05
  • CNACVSS 3.18.12026-11-05
  • CNAweakness (CWE)CWE-3942026-11-05

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Published
2026-11-05
Last Modified
2026-11-05
NVD status
Received

Frequently asked questions

What is 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.

Is CVE-2026-123158 actively exploited?

A proof-of-concept exploit exists for CVE-2026-123158, but active exploitation has not been confirmed at this time.

What is the CVSS score for CVE-2026-123158?

CVE-2026-123158 has a CVSS v3 base score of 8.1 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H.

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