RHSA-2026:22450HighCVSS 9.1

Red Hat Security Advisory: osbuild-composer security update

Published
June 2, 2026
Last Modified
July 27, 2026

🔗 CVE IDs covered (11)

CVE-2026-27137 →CVE-2026-32282 →CVE-2026-33186 →CVE-2026-34986 →CVE-2025-61726 →CVE-2025-61728 →CVE-2025-68121 →CVE-2026-25679 →CVE-2026-32283 →CVE-2026-32286 →CVE-2026-4427 · pending

📋 Description

CVE-2025-61726 — golang: net/url: Memory exhaustion in query parameter parsing in net/url CVE-2025-61728 — golang: archive/zip: Excessive CPU consumption when building archive index in archive/zip CVE-2025-68121 — crypto/tls: crypto/tls: Incorrect certificate validation during TLS session resumption CVE-2026-4427 — github.com/jackc/pgproto3: pgproto3: Denial of Service via negative field length in DataRow message 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-2026-32282 — 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-2026-32286 — github.com/jackc/pgproto3/v2: github.com/jackc/pgproto3/v2: Denial of Service via malicious PostgreSQL server 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-2026-34986 — github.com/go-jose/go-jose/v3: github.com/go-jose/go-jose/v4: Go JOSE: Denial of Service via crafted JSON Web Encryption (JWE) object

🎯 Affected products34

  • Red Hat Enterprise Linux AppStream (v. 10)
  • osbuild-composer-0:165.1-2.el10_2.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10)
  • osbuild-composer-0:165.1-2.el10_2.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 10)
  • osbuild-composer-0:165.1-2.el10_2.s390x as a component of Red Hat Enterprise Linux AppStream (v. 10)
  • osbuild-composer-0:165.1-2.el10_2.src as a component of Red Hat Enterprise Linux AppStream (v. 10)
  • osbuild-composer-0:165.1-2.el10_2.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 10)
  • osbuild-composer-core-0:165.1-2.el10_2.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10)
  • osbuild-composer-core-0:165.1-2.el10_2.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 10)
  • osbuild-composer-core-0:165.1-2.el10_2.s390x as a component of Red Hat Enterprise Linux AppStream (v. 10)
  • osbuild-composer-core-0:165.1-2.el10_2.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 10)
  • osbuild-composer-core-debuginfo-0:165.1-2.el10_2.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10)
  • osbuild-composer-core-debuginfo-0:165.1-2.el10_2.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 10)
  • osbuild-composer-core-debuginfo-0:165.1-2.el10_2.s390x as a component of Red Hat Enterprise Linux AppStream (v. 10)
  • osbuild-composer-core-debuginfo-0:165.1-2.el10_2.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 10)
  • osbuild-composer-debuginfo-0:165.1-2.el10_2.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10)
  • osbuild-composer-debuginfo-0:165.1-2.el10_2.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 10)
  • osbuild-composer-debuginfo-0:165.1-2.el10_2.s390x as a component of Red Hat Enterprise Linux AppStream (v. 10)
  • osbuild-composer-debuginfo-0:165.1-2.el10_2.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 10)
  • osbuild-composer-debugsource-0:165.1-2.el10_2.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10)
  • osbuild-composer-debugsource-0:165.1-2.el10_2.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 10)
  • osbuild-composer-debugsource-0:165.1-2.el10_2.s390x as a component of Red Hat Enterprise Linux AppStream (v. 10)
  • osbuild-composer-debugsource-0:165.1-2.el10_2.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 10)
  • osbuild-composer-tests-debuginfo-0:165.1-2.el10_2.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10)
  • osbuild-composer-tests-debuginfo-0:165.1-2.el10_2.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 10)
  • osbuild-composer-tests-debuginfo-0:165.1-2.el10_2.s390x as a component of Red Hat Enterprise Linux AppStream (v. 10)
  • osbuild-composer-tests-debuginfo-0:165.1-2.el10_2.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 10)
  • osbuild-composer-worker-0:165.1-2.el10_2.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10)
  • osbuild-composer-worker-0:165.1-2.el10_2.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 10)
  • osbuild-composer-worker-0:165.1-2.el10_2.s390x as a component of Red Hat Enterprise Linux AppStream (v. 10)
  • osbuild-composer-worker-0:165.1-2.el10_2.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 10)
  • +4 more not shown

✅ 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: To mitigate this vulnerability, implement a timeout in your archive/zip processing logic to abort the operation if it exceeds a few seconds, preventing the application from consuming an excessive amount of resources. 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.

🔗 References (16)