RHSA-2026:28047HighCVSS 9.1

Red Hat Security Advisory: Red Hat OpenStack Platform 17.1 (etcd) security update

Published
June 22, 2026
Last Modified
July 27, 2026

🔗 CVE IDs covered (11)

CVE-2026-32283 →CVE-2025-61729 →CVE-2026-25679 →CVE-2026-32282 →CVE-2026-33186 →CVE-2026-33413 →CVE-2026-33810 →CVE-2025-61726 →CVE-2025-68121 →CVE-2026-27137 →CVE-2026-32280 →

📋 Description

CVE-2025-61726 — golang: net/url: Memory exhaustion in query parameter parsing in net/url CVE-2025-61729 — crypto/x509: golang: Denial of Service due to excessive resource consumption via crafted certificate CVE-2025-68121 — crypto/tls: crypto/tls: Incorrect certificate validation during TLS session resumption CVE-2026-25679 — net/url: Incorrect parsing of IPv6 host literals in net/url CVE-2026-27137 — crypto/x509: Incorrect enforcement of email constraints in crypto/x509 CVE-2026-32280 — crypto/x509: crypto/tls: golang: Go: Denial of Service vulnerability in certificate chain building CVE-2026-32282 — golang: internal/syscall/unix: Root.Chmod can follow symlinks out of the root CVE-2026-32283 — crypto/tls: golang: Go crypto/tls: Denial of Service via multiple TLS 1.3 key update messages CVE-2026-33186 — google.golang.org/grpc/grpc-go: google.golang.org/grpc/authz: gRPC-Go: Authorization bypass due to improper HTTP/2 path validation CVE-2026-33413 — etcd: etcd: Authorization bypass allows information disclosure and denial of service CVE-2026-33810 — crypto/x509: golang: Go crypto/x509: Certificate validation bypass due to incorrect DNS constraint application

🎯 Affected products5

  • Red Hat OpenStack Platform 17.1
  • etcd-0:3.4.26-9.5.el9ost.src as a component of Red Hat OpenStack Platform 17.1
  • etcd-0:3.4.26-9.5.el9ost.x86_64 as a component of Red Hat OpenStack Platform 17.1
  • etcd-debuginfo-0:3.4.26-9.5.el9ost.x86_64 as a component of Red Hat OpenStack Platform 17.1
  • etcd-debugsource-0:3.4.26-9.5.el9ost.x86_64 as a component of Red Hat OpenStack Platform 17.1

✅ Remediation

For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 Workaround: Red Hat has investigated whether a possible mitigation exists for this issue, and has not been able to identify a practical example. Please update the affected package as soon as possible. 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 issue, implement infrastructure-level normalization to ensure all incoming HTTP/2 `:path` headers are properly formatted with a leading slash before reaching the gRPC-Go server. This can be achieved by configuring a reverse proxy or API gateway to validate and normalize the `:path` header. Ensure that any such intermediary is properly configured and restarted to apply the changes, which may temporarily impact service availability. Workaround: Restrict network access to etcd server ports to ensure only trusted components can establish connections. Implement strong client identity at the transport layer, such as mTLS, with tightly scoped client certificate distribution. This will limit unauthorized access to etcd functions.

🔗 References (12)