Vulnerabilities
Misconfiguration
Compliance
CVE Vulnerabilities

CVE-2026-27145

Unchecked Input for Loop Condition

Published: Jun 02, 2026 | Modified: Jul 20, 2026
CVSS 3.x
N/A
Source:
NVD
CVSS 2.x
RedHat/V2
RedHat/V3
7.5 IMPORTANT
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Ubuntu
MEDIUM
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Additional information
NVDhttps://nvd.nist.gov/vuln/detail/CVE-2026-27145
CWEhttps://cwe.mitre.org/data/definitions/606.html

(*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 hostnames label count. Because x509.Verify validates hostnames before building the certificate chain, this overhead occurred even for untrusted certificates.

Weakness

The product does not properly check inputs that are used for loop conditions, potentially leading to a denial of service or other consequences because of excessive looping.

Affected Software

NameVendorStart VersionEnd Version
Red Hat Enterprise Linux 10RedHatopentelemetry-collector-0:0.152.1-1.el10_2*
Red Hat Enterprise Linux 10RedHatgolang-github-openprinting-ipp-usb-0:0.9.27-7.el10_2.2*
Red Hat Enterprise Linux 10RedHatrhc-1:0.3.8-6.el10_2*
Red Hat Enterprise Linux 10RedHatyggdrasil-0:0.4.9.2-1.el10_2*
Red Hat Enterprise Linux 8RedHatgo-toolset:rhel8-8100020260710105056.a3795dee*
Red Hat Enterprise Linux 9RedHatgolang-0:1.26.4-1.el9_8*
Red Hat Enterprise Linux 9RedHatopentelemetry-collector-0:0.152.1-1.el9_8*
Red Hat Enterprise Linux 9RedHatskopeo-2:1.22.2-7.el9_8*
Red Hat Enterprise Linux 9RedHatrhc-1:0.2.7-8.el9_8*
Red Hat Developer Hub 1.9RedHatrhdh/rhdh-rhel9-operator:1782767215*
Red Hat Hardened ImagesRedHatgolang1-25-main-1.25.11-2.hum1*
Red Hat Hardened ImagesRedHatgolang1-26-main-1.26.4-2.hum1*
Red Hat multicluster global hub 1.4.3RedHatmulticluster-globalhub/multicluster-globalhub-agent-rhel9:1784061472*
Red Hat OpenShift Builds 1.7.1RedHatopenshift-builds/openshift-builds-waiters-rhel9:1783057868*
Red Hat OpenShift Builds 1.8.1RedHatopenshift-builds/openshift-builds-rhel9-operator:1784121108*
Red Hat OpenShift Builds 1.8.1RedHatopenshift-builds/openshift-builds-waiters-rhel9:1783612119*
Red Hat Trusted Artifact Signer 1.4RedHatconforma-cli-stack-v1-4-1.4.2*
Red Hat Trusted Artifact Signer 1.4RedHatconforma-cli-stack-v1-4-1.4.2*
Golang-1.24Ubuntuquesting*
Golang-1.25Ubuntuquesting*

Potential Mitigations

References

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