CVE-2026-56866

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In shared reverse proxy environments, a remote attacker can exploit this issue to cause cross-user response poisoning, potentially exposing sensitive information or serving unintended content to other users."], "name": "CVE-2026-56866", "package_state": [{"cpe": "cpe:/a:redhat:ocp_tools", "fix_state": "Out of support scope", "package_name": "helm", "product_name": "OpenShift Developer Tools and Services"}, {"cpe": "cpe:/a:redhat:openshift_pipelines:1", "fix_state": "Fix deferred", "package_name": "openshift-pipelines-client", "product_name": "OpenShift Pipelines"}, {"cpe": "cpe:/a:redhat:serverless:1", "fix_state": "Fix deferred", "package_name": "kn-workflow-plugin", "product_name": "OpenShift Serverless"}, {"cpe": "cpe:/a:redhat:serverless:1", "fix_state": "Fix deferred", "package_name": "openshift-serverless-clients", "product_name": "OpenShift Serverless"}, {"cpe": "cpe:/a:redhat:service_mesh:3", "fix_state": "Fix deferred", "package_name": "istio-proxy", "product_name": "OpenShift 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Platform 17.1"}, {"cpe": "cpe:/a:redhat:openstack:17.1", "fix_state": "Out of support scope", "package_name": "golang-github-Sirupsen-logrus", "product_name": "Red Hat OpenStack Platform 17.1"}, {"cpe": "cpe:/a:redhat:openstack:17.1", "fix_state": "Out of support scope", "package_name": "golang-uber-atomic", "product_name": "Red Hat OpenStack Platform 17.1"}, {"cpe": "cpe:/a:redhat:openstack:17.1", "fix_state": "Out of support scope", "package_name": "golang-uber-multierr", "product_name": "Red Hat OpenStack Platform 17.1"}, {"cpe": "cpe:/a:redhat:openstack:18.0", "fix_state": "Fix deferred", "package_name": "etcd", "product_name": "Red Hat OpenStack Platform 18.0"}, {"cpe": "cpe:/a:redhat:openstack:18.0", "fix_state": "Fix deferred", "package_name": "golang-github-openstack-k8s-operators-os-diff", "product_name": "Red Hat OpenStack Platform 18.0"}, {"cpe": "cpe:/a:redhat:satellite:6", "fix_state": "Fix deferred", "package_name": "yggdrasil-worker-forwarder", "product_name": "Red Hat Satellite 6"}, {"cpe": "cpe:/a:redhat:service_interconnect:1", "fix_state": "Out of support scope", "package_name": "skupper-cli", "product_name": "Red Hat Service Interconnect 1"}, {"cpe": "cpe:/a:redhat:service_interconnect:2", "fix_state": "Fix deferred", "package_name": "skupper-cli", "product_name": "Red Hat Service Interconnect 2"}, {"cpe": "cpe:/a:redhat:amq_streams:2", "fix_state": "Out of support scope", "package_name": "golang-github-danielqsj-kafka_exporter", "product_name": "streams for Apache Kafka 2"}, {"cpe": "cpe:/a:redhat:amq_streams:3", "fix_state": "Fix deferred", "package_name": "golang-github-danielqsj-kafka_exporter", "product_name": "streams for Apache Kafka 3"}], "public_date": "2026-10-08T22:53:58Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-56866\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-56866\nhttps://go.dev/cl/847306\nhttps://go.dev/issue/81740\nhttps://groups.google.com/g/golang-announce/c/U2fTuyDJznI\nhttps://pkg.go.dev/vuln/GO-2026-6605"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[0,1.26.9)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[1.27.0-0,1.27.2)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "net/http", "source": "cna", "vendor": "Go standard library"}, "product": "net/http", "vendor": "go_standard_library"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[0,1.26.9)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[1.27.0-0,1.27.2)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "cna", "scores": [{"score": 100.0, "source": "cna"}]}, "product": "net/http/httputil", "vendor": "go_standard_library"}], "created": "2026-10-09T00:30:17.783219+00:00", "updated": "2026-10-09T18:00:12.830155+00:00", "vendors": ["go_standard_library", "go_standard_library$PRODUCT$net/http", "go_standard_library$PRODUCT$net/http/httputil"]}