RHSA-2026:99758HighCVSS 7.5

Red Hat Security Advisory: osbuild-composer security update

Published
November 12, 2026
Last Modified
November 12, 2026

🔗 CVE IDs covered (5)

CVE-2026-84445 →CVE-2026-94440 →CVE-2026-97031 →CVE-2026-78667 →CVE-2026-78669 →

📋 Description

CVE-2026-78667 — net/http: golang: golang: Denial of Service via crafted HTTP Range headers CVE-2026-78669 — net/http: net/http/internal/http2: golang.org/x/net/http2: net/http: Denial of Service via excessive HTTP/2 SETTINGS frames CVE-2026-84445 — google.golang.org/grpc: gRPC-Go: Denial of Service via malformed RPC requests CVE-2026-94440 — net/textproto: mime/multipart: golang: golang: Denial of Service via memory limit bypass in multipart form parsing CVE-2026-97031 — crypto/tls: golang: crypto/tls: Denial of Service via multiple ECH outer extension references

🎯 Affected products22

  • Red Hat Enterprise Linux AppStream AUS (v.8.6)
  • Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.6)
  • osbuild-composer-0:46.3-12.el8_6.src as a component of Red Hat Enterprise Linux AppStream AUS (v.8.6)
  • osbuild-composer-0:46.3-12.el8_6.src as a component of Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.6)
  • osbuild-composer-0:46.3-12.el8_6.x86_64 as a component of Red Hat Enterprise Linux AppStream AUS (v.8.6)
  • osbuild-composer-0:46.3-12.el8_6.x86_64 as a component of Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.6)
  • osbuild-composer-core-0:46.3-12.el8_6.x86_64 as a component of Red Hat Enterprise Linux AppStream AUS (v.8.6)
  • osbuild-composer-core-0:46.3-12.el8_6.x86_64 as a component of Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.6)
  • osbuild-composer-core-debuginfo-0:46.3-12.el8_6.x86_64 as a component of Red Hat Enterprise Linux AppStream AUS (v.8.6)
  • osbuild-composer-core-debuginfo-0:46.3-12.el8_6.x86_64 as a component of Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.6)
  • osbuild-composer-debuginfo-0:46.3-12.el8_6.x86_64 as a component of Red Hat Enterprise Linux AppStream AUS (v.8.6)
  • osbuild-composer-debuginfo-0:46.3-12.el8_6.x86_64 as a component of Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.6)
  • osbuild-composer-debugsource-0:46.3-12.el8_6.x86_64 as a component of Red Hat Enterprise Linux AppStream AUS (v.8.6)
  • osbuild-composer-debugsource-0:46.3-12.el8_6.x86_64 as a component of Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.6)
  • osbuild-composer-dnf-json-0:46.3-12.el8_6.x86_64 as a component of Red Hat Enterprise Linux AppStream AUS (v.8.6)
  • osbuild-composer-dnf-json-0:46.3-12.el8_6.x86_64 as a component of Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.6)
  • osbuild-composer-tests-debuginfo-0:46.3-12.el8_6.x86_64 as a component of Red Hat Enterprise Linux AppStream AUS (v.8.6)
  • osbuild-composer-tests-debuginfo-0:46.3-12.el8_6.x86_64 as a component of Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.6)
  • osbuild-composer-worker-0:46.3-12.el8_6.x86_64 as a component of Red Hat Enterprise Linux AppStream AUS (v.8.6)
  • osbuild-composer-worker-0:46.3-12.el8_6.x86_64 as a component of Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.6)
  • osbuild-composer-worker-debuginfo-0:46.3-12.el8_6.x86_64 as a component of Red Hat Enterprise Linux AppStream AUS (v.8.6)
  • osbuild-composer-worker-debuginfo-0:46.3-12.el8_6.x86_64 as a component of Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.6)

✅ 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: 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: In case you consume HTTP2, upgrade to a patched version of the http module. Verify: ``` go version go list -m golang.org/x/net govulncheck ./... ```

🔗 References (8)