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CVE-2026-56855VulnerabilityPublished

Red Hat Security Advisory: Important: Red Hat OpenShift GitOps v1.22.3 security update

Affects Red HatSource GCVE Database

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Authoritative record:CVE-2026-56855· High 7.5

Not known to be exploited · CVSS 7.5 High : upgrade Red Hat ssh to 0.56.0 soon.

Data as of 4 Nov 2026, 06:44 UTC

CVSS 3.1 base score
7.5High
How severe the flaw is on the 0–10 CVSS scale.
Patch
Available – fixed in 0.56.0
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 2 Sep 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 3 Nov 2026.

What to do

Upgrade golang.org/x/crypto/ssh to 0.56.0.

Affected software

ProductAffectedFixed in
golang.org/x/cryptogolang.org/x/crypto/sshAffected
  • <0.56.0
Fixed in
  • 0.56.0
Gogolang.org/x/crypto/sshpkg:golang/golang.org/x/crypto/sshOther threatsAffected
  • <0.56.0
Fixed in
  • 0.56.0

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

A security update for Red Hat OpenShift GitOps v1.22.3 is available and should be applied. Before applying this update, ensure all previously released errata relevant to your system have been installed. Follow the vendor's official guidance at https://access.redhat.com/articles/11258 for update procedures. Applying this update mitigates the identified vulnerabilities.

Description

Red Hat has released a critical security update for Red Hat OpenShift GitOps version 1.22.3 addressing multiple issues including malformed version strings in the Argo Rollouts controller and image updater inconsistencies. The update fixes several CVEs including CVE-2026-56855. Users are advised to apply this update after ensuring all previous errata are applied.

References

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