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No exploitation reportedFix available

CVE-2026-106583

Command Injection via Special Characters in Command-Line Username

No exploitation reported by the sources we read.

  • Published2026-10-07
  • Fixed in10.6
  • WeaknessCWE-99

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

In ssh in OpenSSH before 10.6, a $ or \ character can occur in a command-line username, leading to injection.

Timeline

dates in UTC
  1. 2026-10-0700:17CVE publishedNVD

Observed activity

isMalicious corpus · updated 2026-10-23 21:37 UTC
Indicators tagged with this CVE, per day0 indicators over 7 days
Block these indicators
  • Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2026-106583?format=txt
  • CSV export: https://api.ismalicious.com/edl/cve/CVE-2026-106583?format=csv
  • TAXII collection of exploited CVEs
  • The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD
OpenSSH
BranchAffectedFixed in
10.6< 10.610.6

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Vendor advisories

  • CVE-2026-106583 Red Hat Product Security22 products fixed · 42 known affected

    openssh: openssh: Command injection via unvalidated command-line username

    openssh as a component of Red Hat Enterprise Linux 10 · openssh-askpass as a component of Red Hat Enterprise Linux 10 · openssh-clients as a component of Red Hat Enterprise Linux 10 · +39 more

  • RHSA-2026:82247 Red Hat Product Security22 products fixed

    Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update

Full record on NVD

Fix

  1. Update OpenSSH to 10.6
  2. Vendor fix Red Hat Product Security RHSA-2026:82247 · 22 productsFor details on how to apply this update, which includes the changes described in this advisory, refer to: https://images.redhat.com/
  3. Workaround from the vendor Red Hat Product Security RHSA-2026:82247 · 22 productsMitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
  4. No fix available, says the vendor Red Hat Product Security CVE-2026-106583 · 42 productsAffected

Advisories and patches

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof-of-concept repositories
none listed
PoC-in-GitHub

Sources

  • CISA-ADPSSVC decisionnone2026-10-15
  • OpenCVESSVC decisionnone—
  • CNACVSS 3.12.5read 2026-10-23
  • NVDCVSS 3.17.8read 2026-10-23
  • CNAweakness (CWE)CWE-99read 2026-10-23
  • FIRST EPSSEPSS score0.2 %2026-10-22

Technical details

CVSS v3 Vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Published
2026-10-07
Last Modified
2026-10-15
NVD status
Analyzed

Frequently asked questions

What is CVE-2026-106583?

In ssh in OpenSSH before 10.6, a $ or \ character can occur in a command-line username, leading to injection.

Is CVE-2026-106583 actively exploited?

Active exploitation of CVE-2026-106583 has not been confirmed. Its EPSS score was 0.2% on 2026-10-22, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2026-106583?

CVE-2026-106583 has a CVSS v3 base score of 7.8 (HIGH severity), with vector string CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

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