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High7.5Red Hat Linux

High [CVE-2026-27137] Incorrect enforcement of email constraints in crypto/x509

This high-severity Red Hat Linux advisory covers CVE-2026-27137 affecting Red Hat Enterprise Linux 10.0 Extended Update Support, Red Hat Enterprise Linux 9.6 Extended Update Support, Red Hat OpenStack Platform 17.1 for RHEL 9.

CVE-2026-27137 Published Mar 6, 2026
CVE-2026-27137
Affected products & platforms
Red Hat LinuxUnclassified
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Summary

Incorrect enforcement of email constraints in crypto/x509. Red Hat rates this important (CVSS 7.5).

Weakness: CWE-295. Affected package(s): rhc-worker-playbook, golang1, golang, openshift-gitops, rh-lightspeed-runtimes/runtimes-inventory-rhel9-operator:1.0.2, delve.

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

Affected products named by the advisory: Red Hat Enterprise Linux 10.0 Extended Update Support; Red Hat Enterprise Linux 9.6 Extended Update Support; Red Hat OpenStack Platform 17.1 for RHEL 9; RHEM 1.0 for RHEL 9; and 66 more.

Affected versions
  • rhc-worker-playbook-0:0.2.3-4.el10_1
  • golang1-26-main-1.26.2-1.hum1
  • golang-0:1.26.2-1.el9_8
  • openshift-gitops-1/dex-rhel9:1776773421
  • rh-lightspeed-runtimes/runtimes-inventory-rhel9-operator:1.0.2-1776288486
  • delve-0:1.25.2-3.el10_1
  • multicluster-globalhub/multicluster-globalhub-agent-rhel9:1773650627
  • openshift-gitops-1/dex-rhel8:1776755965
  • devworkspace/devworkspace-rhel9-operator:1776457293
  • openshift-builds/openshift-builds-waiters-rhel9:1774334066
  • web-terminal/web-terminal-exec-rhel9:1776197785
  • web-terminal/web-terminal-exec-rhel9:1775672762

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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