CVE-2026-39350

medium Red Hat
CVSS v3 Base Score
5.4
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
EPSS Score
0.0%
Exploitation probability in 30 days
Top 98% most likely to be exploited
Attack Characteristics
Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Confidentiality
Low
Integrity
Low
Availability
None
Published: April 15, 2026 (85 days ago)
Last Modified: April 15, 2026
Vendor: Red Hat
Source: REDHAT

Description

A flaw was found in Istio, an open platform designed to connect, manage, and secure microservices. The serviceAccounts and notServiceAccounts fields within Istio's AuthorizationPolicy incorrectly interpret dots (.) as a regular expression matcher. This vulnerability allows an attacker to craft service account names that can bypass intended authorization rules. As a result, an ALLOW policy may grant access to unauthorized service accounts, or a DENY policy may fail to block malicious variants, potentially leading to unauthorized access or information disclosure.

CWE

CWE-625

Affected Products

OpenShift Service Mesh 3

References

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