# Openssh: local mitm of x11 forwarding via abstract unix socket pre-binding in red hat enterprise linux openssh client versions CVE record · `CVE-2026-55655` - **Identifiers:** `CVE-2026-55655` - **State:** Confirmed - **Severity:** CVSS 5.0 Medium - **Critical:** No - **CNA:** redhat - **Weakness (CWE):** [CWE-923](https://cwe.mitre.org/data/definitions/923.html) - **Tags:** [CWE-923](https://agentprime.io/advisories/tag/cwe-923.md) - **Technologies:** [Red Hat Enterprise Linux 10](https://agentprime.io/advisories/technology/red-hat-enterprise-linux-10.md) · [Red Hat Enterprise Linux 10.0 Extended Update Support](https://agentprime.io/advisories/technology/red-hat-enterprise-linux-10-0-extended-update-support.md) · [Red Hat Enterprise Linux 8](https://agentprime.io/advisories/technology/red-hat-enterprise-linux-8.md) · [Red Hat Enterprise Linux 9](https://agentprime.io/advisories/technology/red-hat-enterprise-linux-9.md) · [Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions](https://agentprime.io/advisories/technology/red-hat-enterprise-linux-9-2-update-services-for-sap-solutions.md) · [Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions](https://agentprime.io/advisories/technology/red-hat-enterprise-linux-9-4-update-services-for-sap-solutions.md) · [Red Hat Enterprise Linux 9.6 Extended Update Support](https://agentprime.io/advisories/technology/red-hat-enterprise-linux-9-6-extended-update-support.md) · [Red Hat Hardened Images](https://agentprime.io/advisories/technology/red-hat-hardened-images.md) · [Red Hat OpenShift AI 3.0](https://agentprime.io/advisories/technology/red-hat-openshift-ai-3-0.md) · [Red Hat OpenShift AI 3.2](https://agentprime.io/advisories/technology/red-hat-openshift-ai-3-2.md) · [Red Hat OpenShift AI 3.3](https://agentprime.io/advisories/technology/red-hat-openshift-ai-3-3.md) · [Red Hat OpenShift AI 3.4](https://agentprime.io/advisories/technology/red-hat-openshift-ai-3-4.md) · [Red Hat OpenShift AI 3.5](https://agentprime.io/advisories/technology/red-hat-openshift-ai-3-5.md) · [Red Hat Update Infrastructure 5](https://agentprime.io/advisories/technology/red-hat-update-infrastructure-5.md) · [Red Hat Enterprise Linux 6](https://agentprime.io/advisories/technology/red-hat-enterprise-linux-6.md) · [Red Hat Enterprise Linux 7](https://agentprime.io/advisories/technology/red-hat-enterprise-linux-7.md) · [Red Hat OpenShift Container Platform 4](https://agentprime.io/advisories/technology/red-hat-openshift-container-platform-4.md) · [Red Hat OpenShift Container Platform 5](https://agentprime.io/advisories/technology/red-hat-openshift-container-platform-5.md) - **Published:** 23 Jun 2026 - **Updated:** 5 Nov 2026 - **Reviewed by a person:** No Published by the CVE Program (CNA: redhat) at 23 Jun 2026, 03:36 UTC. agentprime has not analysed this yet, so whether it affects any app is not known. This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it. ## Affected products, as the CNA wrote them - Vendor: Red Hat. Product: Red Hat Enterprise Linux 10. - unaffected: `0:9.9p1-25.el10_2 to before *` (rpm) - Other versions: affected - Package name: `openssh` - Collection: `https://access.redhat.com/downloads/content/package-browser/` - Vendor: Red Hat. Product: Red Hat Enterprise Linux 10.0 Extended Update Support. - unaffected: `0:9.9p1-7.el10_0.5 to before *` (rpm) - Other versions: affected - Package name: `openssh` - Collection: `https://access.redhat.com/downloads/content/package-browser/` - Vendor: Red Hat. Product: Red Hat Enterprise Linux 8. - unaffected: `0:8.0p1-30.el8_10 to before *` (rpm) - Other versions: affected - Package name: `openssh` - Collection: `https://access.redhat.com/downloads/content/package-browser/` - Vendor: Red Hat. Product: Red Hat Enterprise Linux 8. - unaffected: `0:8.0p1-30.el8_10 to before *` (rpm) - Other versions: affected - Package name: `openssh` - Collection: `https://access.redhat.com/downloads/content/package-browser/` - Vendor: Red Hat. Product: Red Hat Enterprise Linux 9. - unaffected: `0:9.9p1-9.el9_8 to before *` (rpm) - Other versions: affected - Package name: `openssh` - Collection: `https://access.redhat.com/downloads/content/package-browser/` - Vendor: Red Hat. Product: Red Hat Enterprise Linux 9. - unaffected: `0:9.9p1-9.el9_8 to before *` (rpm) - Other versions: affected - Package name: `openssh` - Collection: `https://access.redhat.com/downloads/content/package-browser/` - Vendor: Red Hat. Product: Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions. - unaffected: `0:8.7p1-30.el9_2.13 to before *` (rpm) - Other versions: affected - Package name: `openssh` - Collection: `https://access.redhat.com/downloads/content/package-browser/` - Vendor: Red Hat. Product: Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions. - unaffected: `0:8.7p1-38.el9_4.10 to before *` (rpm) - Other versions: affected - Package name: `openssh` - Collection: `https://access.redhat.com/downloads/content/package-browser/` - Vendor: Red Hat. Product: Red Hat Enterprise Linux 9.6 Extended Update Support. - unaffected: `0:8.7p1-45.el9_6.5 to before *` (rpm) - Other versions: affected - Package name: `openssh` - Collection: `https://access.redhat.com/downloads/content/package-browser/` - Vendor: Red Hat. Product: Red Hat Hardened Images. - unaffected: `10.3p1-6.hum1 to before *` (rpm) - Other versions: affected - Package name: `openssh-main` - Collection: `https://catalog.redhat.com/software/containers/` - Vendor: Red Hat. Product: Red Hat OpenShift AI 3.0. - unaffected: `1791818590 to before *` (rpm) - Other versions: affected - Package name: `rhai/base-image-cuda-rhel9` - Collection: `https://catalog.redhat.com/software/containers/` - Vendor: Red Hat. Product: Red Hat OpenShift AI 3.0. - unaffected: `1791818589 to before *` (rpm) - Other versions: affected - Package name: `rhai/base-image-cpu-rhel9` - Collection: `https://catalog.redhat.com/software/containers/` - Vendor: Red Hat. Product: Red Hat OpenShift AI 3.0. - unaffected: `1791818505 to before *` (rpm) - Other versions: affected - Package name: `rhai/base-image-spyre-rhel9` - Collection: `https://catalog.redhat.com/software/containers/` - Vendor: Red Hat. Product: Red Hat OpenShift AI 3.0. - unaffected: `1791818496 to before *` (rpm) - Other versions: affected - Package name: `rhai/base-image-tpu-rhel9` - Collection: `https://catalog.redhat.com/software/containers/` - Vendor: Red Hat. Product: Red Hat OpenShift AI 3.0. - unaffected: `1791818502 to before *` (rpm) - Other versions: affected - Package name: `rhai/base-image-rocm-rhel9` - Collection: `https://catalog.redhat.com/software/containers/` - Vendor: Red Hat. Product: Red Hat OpenShift AI 3.0. - unaffected: `1793042072 to before *` (rpm) - Other versions: affected - Package name: `rhai/base-image-cpu-rhel9` - Collection: `https://catalog.redhat.com/software/containers/` - Vendor: Red Hat. Product: Red Hat OpenShift AI 3.2. - unaffected: `1791818602 to before *` (rpm) - Other versions: affected - Package name: `rhai/base-image-spyre-rhel9` - Collection: `https://catalog.redhat.com/software/containers/` - Vendor: Red Hat. Product: Red Hat OpenShift AI 3.2. - unaffected: `1791818598 to before *` (rpm) - Other versions: affected - Package name: `rhai/base-image-cpu-rhel9` - Collection: `https://catalog.redhat.com/software/containers/` - Vendor: Red Hat. Product: Red Hat OpenShift AI 3.2. - unaffected: `1791818512 to before *` (rpm) - Other versions: affected - Package name: `rhai/base-image-tpu-rhel9` - Collection: `https://catalog.redhat.com/software/containers/` - Vendor: Red Hat. Product: Red Hat OpenShift AI 3.2. - unaffected: `1791818587 to before *` (rpm) - Other versions: affected - Package name: `rhai/base-image-cuda-rhel9` - Collection: `https://catalog.redhat.com/software/containers/` - Vendor: Red Hat. Product: Red Hat OpenShift AI 3.2. - unaffected: `1791818778 to before *` (rpm) - Other versions: affected - Package name: `rhai/base-image-rocm-rhel9` - Collection: `https://catalog.redhat.com/software/containers/` - Vendor: Red Hat. Product: Red Hat OpenShift AI 3.2. - unaffected: `1791818512 to before *` (rpm) - Other versions: affected - Package name: `rhai/base-image-rocm-rhel9` - Collection: `https://catalog.redhat.com/software/containers/` - Vendor: Red Hat. Product: Red Hat OpenShift AI 3.3. - unaffected: `1791818782 to before *` (rpm) - Other versions: affected - Package name: `rhai/base-image-tpu-rhel9` - Collection: `https://catalog.redhat.com/software/containers/` - Vendor: Red Hat. Product: Red Hat OpenShift AI 3.3. - unaffected: `1791818782 to before *` (rpm) - Other versions: affected - Package name: `rhai/base-image-rocm-6.4-rhel9` - Collection: `https://catalog.redhat.com/software/containers/` - Vendor: Red Hat. Product: Red Hat OpenShift AI 3.3. - unaffected: `1791818627 to before *` (rpm) - Other versions: affected - Package name: `rhai/base-image-cuda-12.9-rhel9` - Collection: `https://catalog.redhat.com/software/containers/` - Vendor: Red Hat. Product: Red Hat OpenShift AI 3.3. - unaffected: `1791818790 to before *` (rpm) - Other versions: affected - Package name: `rhai/base-image-rocm-7.0-rhel9` - Collection: `https://catalog.redhat.com/software/containers/` - Vendor: Red Hat. Product: Red Hat OpenShift AI 3.3. - unaffected: `1791818874 to before *` (rpm) - Other versions: affected - Package name: `rhai/base-image-cpu-rhel9` - Collection: `https://catalog.redhat.com/software/containers/` - Vendor: Red Hat. Product: Red Hat OpenShift AI 3.3. - unaffected: `1791818792 to before *` (rpm) - Other versions: affected - Package name: `rhai/base-image-neuron-rhel9` - Collection: `https://catalog.redhat.com/software/containers/` - Vendor: Red Hat. Product: Red Hat OpenShift AI 3.3. - unaffected: `1791818662 to before *` (rpm) - Other versions: affected - Package name: `rhai/base-image-cuda-13.0-rhel9` - Collection: `https://catalog.redhat.com/software/containers/` - Vendor: Red Hat. Product: Red Hat OpenShift AI 3.3. - unaffected: `1791818877 to before *` (rpm) - Other versions: affected - Package name: `rhai/base-image-spyre-rhel9` - Collection: `https://catalog.redhat.com/software/containers/` - Vendor: Red Hat. Product: Red Hat OpenShift AI 3.4. - unaffected: `1791883722 to before *` (rpm) - Other versions: affected - Package name: `rhai/base-image-neuron-rhel9` - Collection: `https://catalog.redhat.com/software/containers/` - Vendor: Red Hat. Product: Red Hat OpenShift AI 3.4. - unaffected: `1791881612 to before *` (rpm) - Other versions: affected - Package name: `rhai/base-image-cuda-12.9-rhel9` - Collection: `https://catalog.redhat.com/software/containers/` - Vendor: Red Hat. Product: Red Hat OpenShift AI 3.4. - unaffected: `1791885618 to before *` (rpm) - Other versions: affected - Package name: `rhai/base-image-cpu-rhel9` - Collection: `https://catalog.redhat.com/software/containers/` - Vendor: Red Hat. Product: Red Hat OpenShift AI 3.4. - unaffected: `1791881487 to before *` (rpm) - Other versions: affected - Package name: `rhai/base-image-rocm-6.4-rhel9` - Collection: `https://catalog.redhat.com/software/containers/` - Vendor: Red Hat. Product: Red Hat OpenShift AI 3.4. - unaffected: `1791881732 to before *` (rpm) - Other versions: affected - Package name: `rhai/base-image-spyre-rhel9` - Collection: `https://catalog.redhat.com/software/containers/` - Vendor: Red Hat. Product: Red Hat OpenShift AI 3.4. - unaffected: `1791883315 to before *` (rpm) - Other versions: affected - Package name: `rhai/base-image-rocm-7.1-rhel9` - Collection: `https://catalog.redhat.com/software/containers/` - Vendor: Red Hat. Product: Red Hat OpenShift AI 3.4. - unaffected: `1791881486 to before *` (rpm) - Other versions: affected - Package name: `rhai/base-image-gaudi-rhel9` - Collection: `https://catalog.redhat.com/software/containers/` - Vendor: Red Hat. Product: Red Hat OpenShift AI 3.4. - unaffected: `1791881769 to before *` (rpm) - Other versions: affected - Package name: `rhai/base-image-tpu-rhel9` - Collection: `https://catalog.redhat.com/software/containers/` - Vendor: Red Hat. Product: Red Hat OpenShift AI 3.4. - unaffected: `1791885505 to before *` (rpm) - Other versions: affected - Package name: `rhai/base-image-cuda-13.0-rhel9` - Collection: `https://catalog.redhat.com/software/containers/` - Vendor: Red Hat. Product: Red Hat OpenShift AI 3.5. - unaffected: `1791819252 to before *` (rpm) - Other versions: affected - Package name: `rhai/base-image-spyre-rhel9` - Collection: `https://catalog.redhat.com/software/containers/` And 17 more products. The full list is on the CVE record: ## Not analysed yet We haven’t published our own analysis of this CVE. If a person reviews it, this page will say what’s affected and what has to be true for it to matter. ## Severity and exploitation - 5.0 Medium, CVSS 3.1: `CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:H/I:L/A:N`, from CNA (redhat) - **CISA KEV:** Not listed. - **EPSS:** 0.0012, the 2nd percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days. ## Timeline - 23 Jun 2026, 03:36 UTC: [Confirmed by the CVE List](https://www.cve.org/CVERecord?id=CVE-2026-55655) - 23 Jun 2026, 04:17 UTC: [Confirmed by NVD](https://nvd.nist.gov/vuln/detail/CVE-2026-55655) ## Sources - [CVE List: CVE-2026-55655](https://www.cve.org/CVERecord?id=CVE-2026-55655) - [NVD: CVE-2026-55655](https://nvd.nist.gov/vuln/detail/CVE-2026-55655) ### References from the CNA - (vendor-advisory, redhat) - (vendor-advisory, redhat) - (vendor-advisory, redhat) - (vendor-advisory, redhat) - (vendor-advisory, redhat) - (vendor-advisory, redhat) - (vendor-advisory, redhat) - (vendor-advisory, redhat) - (vendor-advisory, redhat) - (vendor-advisory, redhat) - (vendor-advisory, redhat) - (vendor-advisory, redhat) - (vendor-advisory, redhat) - (vendor-advisory, redhat) - (vendor-advisory, redhat) - (vendor-advisory, redhat) - (vendor-advisory, redhat) - (vendor-advisory, redhat) - (vendor-advisory, redhat) - (vendor-advisory, redhat) - (vendor-advisory, redhat) - (vendor-advisory, redhat) - (vendor-advisory, redhat) - (vendor-advisory, redhat) - (vendor-advisory, redhat) - (vendor-advisory, redhat) - (vendor-advisory, redhat) - (vendor-advisory, redhat) - (vendor-advisory, redhat) - (vendor-advisory, redhat) And 20 more on the CVE record. Facts on this page come from the CVE List as the CNA published them, with CVSS from the sources named above, CISA KEV and FIRST EPSS. Vendors, products and versions are shown as the CNA wrote them. We don’t reproduce the CVE’s description. ## Check whether this affects you This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it. Compare the affected versions above with what you run. - With the agentprime MCP server (), `get_advisory` returns this record and `search_advisories` finds related ones. Setup: - As JSON: - Everything that needs attention now: --- The web page: . Everything for agents: .