Event Monitor Cyber
EM-20261105-CR0Y VulnerabilityHigh severity

OpenSSH Vulnerability (CVE-2026-123158)

CVE-2026-123158

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21 hours from first report to confirmed exploitation.

Status
Confirmed

Since : exploitation in the wild reported.

First Signal
Nov 05 15:46 UTCC41 Red Hat Security Data
Page Born
Nov 05 16:17 UTCsecond source joined
Last Signal
Nov 06 12:49 UTC2 hours before snapshot
Sources
31 official · 2 research, news or crowd
Open For
21 hoursso far

Life Of This Page

  1. 1
    Born
    A second, independent source names it.
  2. 2
    Developing
    New signals join; severity can move.
  3. 3
    Confirmed · Now
    CISA KEV lists it, or exploitation in the wild is reported.
  4. 4
    Resolved
    Not yet
    Past the fix deadline and 14 days with no new signal.
  5. 5
    Archived
    Not yet
    30 days after resolved. Read only; the link keeps working. Reopens if it comes back.

The ID never changes, and earlier addresses keep working. A correction is logged, never overwritten. If two pages turn out to be one incident, the later one points to the earlier.

Vulnerability Lifecycle

  1. Disclosed: reached
    Nov 05 16:17 UTC
    C6 NVD published
  2. Scored: reached
    Nov 05 16:17 UTC
    CVSS 8.1
  3. Exploited: reached
    Nov 06 12:49 UTC
    C134 reports use in the wild
  4. Advisories: not yet
    Not yet
    None yet
  5. Vendor Response: reached
    Nov 05 15:46 UTC
    C41 published
  6. Resolved: not yet
    Not yet
    After 14 quiet days

Timeline

12:0018:00Nov 606:0012:00BornConfirmedC41 Red Hat Security DataC6 NVD CVE API 2.0C134 Help Net Security

Point at a mark to read it. Squares are signals, colored by severity; every one is also listed under Signals.

Signals

  1. OpenSSH flaw exploited in the wild just hours after disclosure (CVE-2026-123158) (opens source in a new tab) An OpenSSH flaw that lets remote attackers log into passwordless accounts on Alpine Linux and other musl-based systems is being exploited, threat intelligence firm Previdian has warned. The flaw (CVE-2026-123158)… Med severityResearch & NewsC134 Help Net Security
  2. CVE-2026-123158 (CVSS 8.1) (opens source in a new tab) 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)… High severityDatabaseC6 NVD CVE API 2.0
  3. Red Hat: CVE-2026-123158 (important) (opens source in a new tab) openssh: OpenSSH: Password authentication bypass via password hash misinterpretation High severityVendorC41 Red Hat Security Data