VDB
RHSA-2026:54525
RHSA-2026:54525
PUBLISHED
CVSS 7.5 HIGH
A flaw was found in the `crypto/x509` package of `golang`. This vulnerability allows a remote attacker to cause a Denial of Service (DoS) by presenting a specially crafted X.509 certificate with a large number of DNS Subject Alternative Name (SAN) entries. The certificate verification process, specifically the `VerifyHostname` function, incurs excessive computational overhead due to repeated string operations when processing these entries. This can lead to a significant performance degradation or unresponsiveness of systems validating such certificates.
Risk Scores
CVSS 3.1
7.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Red Hat | registry.redhat.io/external-secrets-operator/external-secrets-rhel9@sha256:6853e928761a2e1980838319fd89592831cda348f3d098fac9aa2873ca4db332_ppc64le as a component of external secrets operator for Red Hat OpenShift 1.1 | * |
| Red Hat | registry.redhat.io/external-secrets-operator/external-secrets-rhel9@sha256:d9cb4c7d68769f943bed8b84299e2d4df5ca209cad85bf0ff44ab80e8fe822c9_amd64 as a component of external secrets operator for Red Hat OpenShift 1.1 | * |
| Red Hat | registry.redhat.io/external-secrets-operator/external-secrets-rhel9@sha256:27d536de88403ec57239e6fb4c674fd2c5736fefd093df009af4089fb55a682a_arm64 as a component of external secrets operator for Red Hat OpenShift 1.1 | * |
| Red Hat | registry.redhat.io/external-secrets-operator/external-secrets-rhel9@sha256:534f8dce891c9efd0155ab9408150e5c166ad40f041aaedd80dea623014e66f7_s390x as a component of external secrets operator for Red Hat OpenShift 1.1 | * |
Timeline
- Aug 13, 2026 CVE Published
- Sep 30, 2026 CVE Updated
- Sep 30, 2026 Distribution Patch
- Sep 30, 2026 Distribution Patch
- Sep 30, 2026 Security Advisory
- Sep 30, 2026 Security Advisory
- Sep 30, 2026 Security Advisory
- Sep 30, 2026 Security Advisory
- Sep 30, 2026 Security Advisory
References
- https://access.redhat.com/errata/RHSA-2026:54525 advisory
- https://access.redhat.com/security/cve/CVE-2026-27145 advisory
- https://access.redhat.com/security/cve/CVE-2026-39835 advisory
- https://access.redhat.com/security/cve/CVE-2026-44740 advisory
- https://access.redhat.com/security/cve/CVE-2026-56852 advisory
- https://access.redhat.com/security/updates/classification/ advisory
- https://docs.redhat.com/en/documentation/openshift_container_platform/latest/html/security_and_compliance/external-secrets-operator-for-red-hat-openshift advisory
- https://security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_54525.json advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2484207 issue
- https://www.cve.org/CVERecord?id=CVE-2026-27145 advisory
- https://nvd.nist.gov/vuln/detail/CVE-2026-27145 advisory
- https://go.dev/cl/783621 advisory
- https://go.dev/issue/79694 advisory
- https://groups.google.com/g/golang-announce/c/tKs3rmcBcKw advisory
- https://pkg.go.dev/vuln/GO-2026-5037 advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2480680 issue
- https://www.cve.org/CVERecord?id=CVE-2026-39835 advisory
- https://nvd.nist.gov/vuln/detail/CVE-2026-39835 advisory
- https://go.dev/cl/781660 advisory
- https://go.dev/issue/79563 advisory
…and 14 more