RHSA-2026:97387HighCVSS 7.5

Red Hat Security Advisory: go-fdo-server security update

Published
November 10, 2026
Last Modified
November 14, 2026

🔗 CVE IDs covered (4)

CVE-2026-56859 →CVE-2026-25679 →CVE-2026-27137 →CVE-2026-33811 →

📋 Description

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-2026-33811 — net: golang: Go net package: Denial of Service via long CNAME response in LookupCNAME CVE-2026-56859 — encoding/xml: golang: Go: Denial of Service via XML decoding recursion depth issue

🎯 Affected products11

  • Red Hat Enterprise Linux AppStream (v. 10)
  • go-fdo-server-0:1.0.1-6.el10_3.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10)
  • go-fdo-server-0:1.0.1-6.el10_3.src as a component of Red Hat Enterprise Linux AppStream (v. 10)
  • go-fdo-server-0:1.0.1-6.el10_3.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 10)
  • go-fdo-server-debuginfo-0:1.0.1-6.el10_3.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10)
  • go-fdo-server-debuginfo-0:1.0.1-6.el10_3.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 10)
  • go-fdo-server-debugsource-0:1.0.1-6.el10_3.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10)
  • go-fdo-server-debugsource-0:1.0.1-6.el10_3.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 10)
  • go-fdo-server-manufacturer-0:1.0.1-6.el10_3.noarch as a component of Red Hat Enterprise Linux AppStream (v. 10)
  • go-fdo-server-owner-0:1.0.1-6.el10_3.noarch as a component of Red Hat Enterprise Linux AppStream (v. 10)
  • go-fdo-server-rendezvous-0:1.0.1-6.el10_3.noarch as a component of Red Hat Enterprise Linux AppStream (v. 10)

✅ 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: To mitigate this issue, applications can be configured to use the pure Go DNS resolver instead of the `cgo` DNS resolver. This can be achieved by setting the `GODEBUG` environment variable to `netdns=go`. For example, to run a Go application with this mitigation: `GODEBUG=netdns=go /path/to/your/go/application`. This change may require restarting affected applications or services to take effect. Users should verify that this change does not negatively impact DNS resolution for their specific application environment. 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.

🔗 References (8)