CVE-2026-56854

critical Red Hat
CVSS v3 Base Score
9.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
EPSS Score
0.3%
Exploitation probability in 30 days
Top 75% most likely to be exploited
Attack Characteristics
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Confidentiality
High
Integrity
High
Availability
None
Published: August 28, 2026 (9 days ago)
Last Modified: August 28, 2026
Vendor: Red Hat
Source: REDHAT

Description

The source-address critical option in the Permissions returned by an authentication callback was only enforced for the PublicKeyCallback and VerifiedPublicKeyCallback paths, extending the fix for CVE-2026-46595. Permissions returned by the PasswordCallback, KeyboardInteractiveCallback, NoClientAuthCallback, and GSSAPIWithMICConfig.AllowLogin callbacks were not validated against the client's remote address, so a source-address restriction set by those callbacks was silently ignored. The check is now applied to the Permissions returned by any authentication callback.

CWE

CWE-346

Affected Products

Assisted Installer for Red Hat OpenShift Container Platform 2Builds for Red Hat OpenShiftcert-manager Operator for Red Hat OpenShiftConfidential Compute AttestationCryostat 4External Secrets Operator for Red Hat OpenShiftMulticluster Engine for KubernetesOpenShift API for Data ProtectionOpenShift PipelinesOpenShift Serverless

References

🔗 bugzilla.redhat.com 🔗 www.cve.org 🔗 nvd.nist.gov 🔗 go.dev 🔗 go.dev