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Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process. (*x509.Certificate).VerifyHostname previously called matchHostnames in a loop over all DNS Subject Alternative Name (SAN) entries. This caused strings.Split(host, ".") to execute repeatedly on the same input hostname. With a large DNS SAN list, verification costs scaled quadratically based on the number of SAN entries multiplied by the hostname's label count. Because x509.Verify validates hostnames before building the certificate chain, this overhead occurred even for untrusted certificates.
This is potentially applicable, but need to wait for a build with golang 1.25.11 or 1.26.4 or later.
FEDORA-EPEL-2026-25a711e1d1 (apptainer-1.5.3-3.el8) has been submitted as an update to Fedora EPEL 8. https://bodhi.fedoraproject.org/updates/FEDORA-EPEL-2026-25a711e1d1
FEDORA-EPEL-2026-25a711e1d1 has been pushed to the Fedora EPEL 8 testing repository. You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-EPEL-2026-25a711e1d1 See also https://fedoraproject.org/wiki/QA:Updates_Testing for more information on how to test updates.
FEDORA-EPEL-2026-25a711e1d1 (apptainer-1.5.3-3.el8) has been pushed to the Fedora EPEL 8 stable repository. If problem still persists, please make note of it in this bug report.