RHSA-2026:37296HighCVSS 8.8

Red Hat Security Advisory: RHTAS 1.0.1 - GA Release Of the Policy Controller Operator

Published
July 9, 2026
Last Modified
September 28, 2026

🔗 CVE IDs covered (4)

CVE-2026-39828 →CVE-2026-39829 →CVE-2026-39830 →CVE-2026-39835 →

📋 Description

CVE-2026-39828 — golang.org/x/crypto/ssh: golang.org/x/crypto/ssh: Unauthorized command execution via discarded SSH permissions CVE-2026-39829 — golang.org/x/crypto/ssh: golang.org/x/crypto/ssh: Denial of Service via crafted public key with excessive parameters CVE-2026-39830 — golang.org/x/crypto/ssh: golang.org/x/crypto/ssh: Denial of Service via resource leak from unsolicited SSH responses CVE-2026-39835 — golang.org/x/crypto/ssh: golang: golang.org/x/crypto/ssh: Denial of Service via crafted SSH certificate

🎯 Affected products3

  • Red Hat Trusted Artifact Signer 1.4
  • registry.redhat.io/rhtas/policy-controller-operator-bundle@sha256:d77bdf55a68e9bfce079a693f154b0c122b80ed652ad480233c51673f30baaec_amd64 as a component of Red Hat Trusted Artifact Signer 1.4
  • registry.redhat.io/rhtas/policy-controller-rhel9-operator@sha256:8c33fe382a956f42a6aa9e87580a8b6b33fddd847b968b4fdae64264ac1950d4_amd64 as a component of Red Hat Trusted Artifact Signer 1.4

✅ Remediation

The RHTAS Policy Controller Operator is Helm-based operator for deploying and managing instances of the Sigstore Policy Controller on OpenShift. It is a self-managed on-premise deployment of the Policy Controller Helm Charts available at https://github.com/sigstore/helm-charts/tree/main/charts/policy-controller Platform Engineers, Software Developers and Security Professionals may use the RHTAS Policy Controller Operator to enforce policies on OCP clusters by using supply-chain metadata. For details on using the RHTAS Policy Controller Operator, refer to the product documentation at https://access.redhat.com/documentation/en-us/red_hat_trusted_artifact_signer/1.4 Workaround: Mitigation 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. Workaround: To mitigate this denial of service vulnerability, restrict network access to any service that utilizes the `golang.org/x/crypto/ssh` library and is exposed to untrusted networks. Implement firewall rules to allow connections only from trusted hosts or networks. This action limits the ability of malicious peers to send unsolicited global request responses. A restart of the affected service may be necessary for the new network rules to be applied effectively.

🔗 References (8)