Low 3.7Published Aug 6, 2025

CVE-2025-8556Github.com/cloudflare/circl: circl-fourq: missing and wrong validation can lead to incorrect results

Updated under an hour ago (Oct 28, 2026, 3:00 AM ET)

Does this affect you?

It affects Red Hat Builds for Red Hat OpenShift and 22 other products. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

Do this next

Start free and add your stack

Free account, 1 product

Every CVE for Red Hat Builds for Red Hat OpenShift

Exploited in the last 30 days

A flaw was found in CIRCL's implementation of the FourQ elliptic curve. This vulnerability allows an attacker to compromise session security via low-order point injection and incorrect point validation during Diffie-Hellman key exchange.

CVSS: 3.7 LOW (v3.1, CNA)CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N
Weakness (CWE): CWE-1287
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: redhat
NVD analysis: Deferred
Record last updated: Oct 27, 2026
First seen by InfoSec Signals: Oct 27, 2026

Affected products

Affected products

Red Hat Builds for Red Hat OpenShift redhat:openshift_builds	1	CNA record
Red Hat Custom Metric Autoscaler operator for Red Hat Openshift redhat:openshift_custom_metrics_autoscaler	2	CNA record
Red Hat Multicluster Global Hub redhat:multicluster_globalhub	All versions	CNA record
Red Hat OpenShift Pipelines redhat:openshift_pipelines	1	CNA record
Red Hat OpenShift Serverless redhat:serverless	1	CNA record
Red Hat OpenShift Service Mesh 3 redhat:service_mesh	3	CNA record
Red Hat Red Hat Advanced Cluster Management for Kubernetes 2 redhat:acm	2	CNA record
Red Hat Red Hat Advanced Cluster Security 4 redhat:advanced_cluster_security	4	CNA record
Red Hat Red Hat Ceph Storage 5 redhat:ceph_storage	5	CNA record
Red Hat Red Hat Developer Hub 1 redhat:rhdh	1	CNA record
1–10 of 23

References

References

https://access.redhat.com/security/cve/CVE-2025-8556	vdb-entry, x-refsource-redhat
https://bugzilla.redhat.com/show_bug.cgi?id=2371624	issue-tracking, x-refsource-redhat
https://github.com/cloudflare/circl
https://github.com/cloudflare/circl/security/advisories/GHSA-2x5j-vhc8-9cwm
https://github.com/cloudflare/circl/tree/v1.6.1
https://news.ycombinator.com/item?id=45669593
https://www.botanica.software/blog/cryptographic-issues-in-cloudflares-circl-fourq-implementation

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.