CVE-2026-31838

medium Red Hat
CVSS v3 Base Score
5.3
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
EPSS Score
0.0%
Exploitation probability in 30 days
Top 88% most likely to be exploited
Attack Characteristics
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Confidentiality
Low
Integrity
None
Availability
None
Published: March 10, 2026 (64 days ago)
Last Modified: March 10, 2026
Vendor: Red Hat
Source: REDHAT

Description

A flaw was found in Istio. This vulnerability in Envoy's Role-Based Access Control (RBAC) header matching could allow an attacker to bypass authorization policies. By crafting requests with multiple header values, an attacker could cause Envoy to misinterpret the header, leading to unauthorized access to protected services.

CWE

CWE-551

Affected Products

cert-manager Operator for Red Hat OpenShiftExternalDNS OperatorOpenShift ServerlessOpenShift Service Mesh 2OpenShift Service Mesh 3Red Hat Ansible Automation Platform 2Red Hat Connectivity Link 1Red Hat OpenShift AI (RHOAI)

References

🔗 bugzilla.redhat.com 🔗 www.cve.org 🔗 nvd.nist.gov 🔗 github.com