RHSA-2026:37628HighCVSS 7.5

Red Hat Security Advisory: OpenShift Container Platform 4.20.29 bug fix and security update

Published
July 14, 2026
Last Modified
August 26, 2026

🔗 CVE IDs covered (4)

CVE-2026-13676 →CVE-2026-44293 →CVE-2026-6322 →CVE-2026-9595 →

📋 Description

CVE-2026-6322 — fast-uri: fast-uri: URI authority bypass due to improper delimiter handling CVE-2026-9595 — webpack-dev-server: webpack-dev-server: Information disclosure and denial of service via improper proxy configuration CVE-2026-13676 — fast-uri: fast-uri: Security policy bypass due to improper Unicode hostname canonicalization CVE-2026-44293 — protobufjs: protobufjs: Arbitrary code execution due to unsafe expression generation from crafted protobuf descriptors

🎯 Affected products200

  • Red Hat OpenShift Container Platform 4.20
  • registry.redhat.io/openshift4/aws-karpenter-provider-aws-rhel9@sha256:833bff8f55e386baa856f96b465f58e305f6160dd0c28f99858c2e423900d383_arm64 as a component of Red Hat OpenShift Container Platform 4.20
  • registry.redhat.io/openshift4/aws-karpenter-provider-aws-rhel9@sha256:8ad7e8ab851b29df21971534e194656a84a592019e345e4c0049b66a50c8eec6_ppc64le as a component of Red Hat OpenShift Container Platform 4.20
  • registry.redhat.io/openshift4/aws-karpenter-provider-aws-rhel9@sha256:a688dcc4e27f8a834df2ade35ad61fcc3c2eec076312d9ca1bcf43b04e30a17f_amd64 as a component of Red Hat OpenShift Container Platform 4.20
  • registry.redhat.io/openshift4/aws-karpenter-provider-aws-rhel9@sha256:dab9563b1453148d2cc7d12c10249fdb6e06223ee9d054ff6a3e6e118123562e_s390x as a component of Red Hat OpenShift Container Platform 4.20
  • registry.redhat.io/openshift4/aws-kms-encryption-provider-rhel9@sha256:02740f2c139b315d4d6f21d6d66f851a93523f15098a53ee3ebf036d3880c1be_s390x as a component of Red Hat OpenShift Container Platform 4.20
  • registry.redhat.io/openshift4/aws-kms-encryption-provider-rhel9@sha256:46057c2a9b99171425f3c8690a1a89134c371a38d2ffd41808ef134876dfe35b_arm64 as a component of Red Hat OpenShift Container Platform 4.20
  • registry.redhat.io/openshift4/aws-kms-encryption-provider-rhel9@sha256:7480f558c0ffac5438f4a8646c78f8d6dbd81690d2ef59a2d336f68f6083a587_ppc64le as a component of Red Hat OpenShift Container Platform 4.20
  • registry.redhat.io/openshift4/aws-kms-encryption-provider-rhel9@sha256:8e20db5aabfd5be30b9c7d3713843f26ef4758edcfce7200833ed732f49035b9_amd64 as a component of Red Hat OpenShift Container Platform 4.20
  • registry.redhat.io/openshift4/azure-kms-encryption-provider-rhel9@sha256:34a141cfdf89936929fc7870a87b35a6fd4fec47ca281db937b7e550b3075bc3_arm64 as a component of Red Hat OpenShift Container Platform 4.20
  • registry.redhat.io/openshift4/azure-kms-encryption-provider-rhel9@sha256:41ba978f1eee5048f2a6ba84d05f220e6b634585655b8fe4b8ce00c62b96a78f_amd64 as a component of Red Hat OpenShift Container Platform 4.20
  • registry.redhat.io/openshift4/azure-kms-encryption-provider-rhel9@sha256:c19adab6346ab7b63eeaf935bb0d57602a269e0a0375e37043e9b410dcfe3b43_s390x as a component of Red Hat OpenShift Container Platform 4.20
  • registry.redhat.io/openshift4/azure-kms-encryption-provider-rhel9@sha256:c46320bdda63061c1867d59cadc3afdcff1191f039bfdf2887b05dda150c2054_ppc64le as a component of Red Hat OpenShift Container Platform 4.20
  • registry.redhat.io/openshift4/azure-service-rhel9-operator@sha256:1c9877bc9ae8b4e217ec81240bdb48a77519afd1f574c4f51b55929ee89408ec_amd64 as a component of Red Hat OpenShift Container Platform 4.20
  • registry.redhat.io/openshift4/azure-service-rhel9-operator@sha256:afe976b465b0f0555980c2b52bcdf6d60cbbcf3f5481b4ab9af0873b1cfb4964_arm64 as a component of Red Hat OpenShift Container Platform 4.20
  • registry.redhat.io/openshift4/azure-service-rhel9-operator@sha256:be3841b4ee7183bbbf4bf8bb55153204bb1b4d6a77ccbbdb77eb532dde01d14b_ppc64le as a component of Red Hat OpenShift Container Platform 4.20
  • registry.redhat.io/openshift4/azure-service-rhel9-operator@sha256:f08612df6ca2a96cbad852ed1f39fc6390ef94761b4ac5d7b73e6693eac5ed29_s390x as a component of Red Hat OpenShift Container Platform 4.20
  • registry.redhat.io/openshift4/cloud-network-config-controller-rhel9@sha256:7eaf4283ccb2b7dcb4fae4fd69f771d3821c84fe401efdae169c82d1ee25396d_arm64 as a component of Red Hat OpenShift Container Platform 4.20
  • registry.redhat.io/openshift4/cloud-network-config-controller-rhel9@sha256:affecfb05da4cb4683bbc14eb1597bc9d721ceef1ae43531b6615e6365042096_amd64 as a component of Red Hat OpenShift Container Platform 4.20
  • registry.redhat.io/openshift4/cloud-network-config-controller-rhel9@sha256:b4c8b6e00c44c6ffe2b20d696b0053796746d9aee5fa9040609557d2a7f12b01_s390x as a component of Red Hat OpenShift Container Platform 4.20
  • registry.redhat.io/openshift4/cloud-network-config-controller-rhel9@sha256:f587f885b2d850322f57178537a815b73407ed5f1f415db6e92a21f9c6bd2494_ppc64le as a component of Red Hat OpenShift Container Platform 4.20
  • registry.redhat.io/openshift4/container-networking-plugins-microshift-rhel9@sha256:469559490d5709e591af621257b89c6e572307e1eef1b881d03f4340fb7ab16f_s390x as a component of Red Hat OpenShift Container Platform 4.20
  • registry.redhat.io/openshift4/container-networking-plugins-microshift-rhel9@sha256:4e1629c70a5d3ea68524d9271f405d240cca372b8cde74a4fe03ec04e9bbf80b_amd64 as a component of Red Hat OpenShift Container Platform 4.20
  • registry.redhat.io/openshift4/container-networking-plugins-microshift-rhel9@sha256:65be9346179e6e6625866cfd0dc188626650d8568cd4680943fe2f71fa2205a1_ppc64le as a component of Red Hat OpenShift Container Platform 4.20
  • registry.redhat.io/openshift4/container-networking-plugins-microshift-rhel9@sha256:773d08b813d4d1dea48b3d42335a96d0265f11fdceb916bcbb94e7b495cf3b2f_arm64 as a component of Red Hat OpenShift Container Platform 4.20
  • registry.redhat.io/openshift4/driver-toolkit-rhel9@sha256:51d0e98ce493cf5543f065d5b8f223694b5cfc37671e34a05351363784255529_arm64 as a component of Red Hat OpenShift Container Platform 4.20
  • registry.redhat.io/openshift4/driver-toolkit-rhel9@sha256:66a87468d6b0362c84d33d100e6f0a228a019f12b675103b65ca97cd0d16645c_ppc64le as a component of Red Hat OpenShift Container Platform 4.20
  • registry.redhat.io/openshift4/driver-toolkit-rhel9@sha256:97119a14dc2bbc336f6d55dd5076bbac6ae968634a5a746b085a8099bd977de4_amd64 as a component of Red Hat OpenShift Container Platform 4.20
  • registry.redhat.io/openshift4/driver-toolkit-rhel9@sha256:977d378bca2f153c19ed4f2846167a5814a1b2e2866ae63880eef97d1258f67d_s390x as a component of Red Hat OpenShift Container Platform 4.20
  • registry.redhat.io/openshift4/egress-router-cni-rhel9@sha256:2c883cbf2af6d23f6db62fb44523f3938ad7c395f1393fdacfe8028f32fe5b41_amd64 as a component of Red Hat OpenShift Container Platform 4.20
  • +170 more not shown

✅ Remediation

For OpenShift Container Platform 4.20 see the following documentation, which will be updated shortly for this release, for important instructions on how to upgrade your cluster and fully apply this asynchronous errata update: https://docs.redhat.com/en/documentation/openshift_container_platform/4.20/html/release_notes/ You may download the oc tool and use it to inspect release image metadata for x86_64, s390x, ppc64le, and aarch64 architectures. The image digests may be found at https://quay.io/repository/openshift-release-dev/ocp-release?tab=tags. The sha values for the release are as follows: (For x86_64 architecture) The image digest is sha256:295c05b56669cab8d347e830ba098bbd0200025090ff09af3562790b2e62cc67 (For s390x architecture) The image digest is sha256:38b56b4c95927fc009ce69d8ccaaf37b898dbaf1620aa600ffa56c9a5b7a08fe (For ppc64le architecture) The image digest is sha256:866568017d3c417485644174c87e09b0368e5962630fe1c012e4511525e0493b (For aarch64 architecture) The image digest is sha256:2edfff61c462e026b2231476a3f4d97560634516372e7c0eb74001023e1fc324 All OpenShift Container Platform 4.20 users are advised to upgrade to these updated packages and images when they are available in the appropriate release channel. To check for available updates, use the OpenShift CLI (oc) or web console. Instructions for upgrading a cluster are available at https://docs.redhat.com/en/documentation/openshift_container_platform/4.20/html-single/updating_clusters/index#updating-cluster-cli. Workaround: To mitigate this issue, users should avoid configuring `webpack-dev-server` with a broad proxy context (e.g., `/`) when WebSocket forwarding (`ws: true`) is enabled. Instead, define specific paths for the proxy context. Alternatively, disable WebSocket forwarding by omitting `ws: true` from the proxy entry if WebSocket functionality is not required for the proxy target. This configuration change may require restarting the `webpack-dev-server` instance to take effect. 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: 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.

🔗 References (7)