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High8.8Red Hat Linux

High [CVE-2026-33810] Go crypto/x509: Certificate validation bypass due to incorrect DNS constraint application

This high-severity Red Hat Linux advisory covers CVE-2026-33810 affecting Cryostat 4 on RHEL 9, RHEM 1.0 for RHEL 9, Red Hat Satellite 6.19 for RHEL 9.

CVE-2026-33810 Published Apr 8, 2026
CVE-2026-33810
Affected products & platforms
Red Hat LinuxUnclassified
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Summary

Go crypto/x509: Certificate validation bypass due to incorrect DNS constraint application. Red Hat rates this important (CVSS 8.8).

Weakness: CWE-1289. Affected package(s): rhtas/client-server-rhel9:1780399582, golang1, cryostat/cryostat-storage-rhel9:4.1.1, opentelemetry-collector, hawtio-operator-container, web-terminal/web-terminal-exec-rhel9:1780425077.

Resolved in Red Hat advisory RHSA-2026:28047 — update the affected packages (`sudo dnf update`).

Affected products named by the advisory: Cryostat 4 on RHEL 9; RHEM 1.0 for RHEL 9; Red Hat Satellite 6.19 for RHEL 9; Red Hat Enterprise Linux AppStream EUS (v. 10.0); and 78 more.

Affected versions
  • rhtas/client-server-rhel9:1780399582
  • golang1-26-main-1.26.2-1.hum1
  • cryostat/cryostat-storage-rhel9:4.1.1-7
  • opentelemetry-collector-0:0.144.0-2.el10_0
  • hawtio-operator-container
  • opentelemetry-collector-0:0.144.0-2.el10_2
  • web-terminal/web-terminal-exec-rhel9:1780425077
  • rh-lightspeed-runtimes/runtimes-inventory-rhel9-operator:1.0.3-1779996197
  • multicluster-globalhub/multicluster-globalhub-agent-rhel9:1779838819
  • web-terminal/web-terminal-exec-rhel9:1780423339
  • yggdrasil-worker-forwarder-0:0.0.3-5.el9sat
  • etcd-0:3.4.26-9.5.el9ost

Official advisory · high-confidence parse· fetched 2 months ago·verify at source

Fixed versions
  • RHSA-2026:28047

Official advisory · high-confidence parse· fetched 2 months ago·verify at source

Mitigation checklist

Recommended fix / mitigation
  • Update the affected package(s) to the fixed version shipped in RHSA-2026:28047 (`sudo dnf update` / `yum update`).

Official advisory · high-confidence parse· fetched 2 months ago·verify at source

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