CVEvulnerability

CVE-2026-39350

5.4 MEDIUM Published 2026-04-15 Modified 2026-06-17 Official page ↗
Status
Analyzed
Published
2026-04-15
Last modified
2026-06-17
Assigner
[email protected]
CVSS 3.1 ([email protected])
5.4 MEDIUM — CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
Weaknesses
CWE-185, CWE-863

Description

Istio is an open platform to connect, manage, and secure microservices. In versions 1.25.0 through 1.27.8, 1.28.0 through 1.28.5, 1.29.0, and 1.29.1, the serviceAccounts and notServiceAccounts fields in AuthorizationPolicy incorrectly interpret dots (.) as a regular expression matcher. Because . is a valid character in a service account name, an AuthorizationPolicy ALLOW rule targeting a service account such as cert-manager.io also matches cert-manager-io, cert-managerXio, etc. A DENY rule targeting the same name fails to block those variants. Fixes are available in versions 1.29.2, 1.28.6, and 1.27.9.

Affected configurations

• istio istio (>= 1.25.0 < 1.27.9) • istio istio (>= 1.28.0 < 1.28.6) • istio istio (>= 1.29.0 < 1.29.2)

Related

Weakness · CWE (2)

  • CWE-185 Incorrect Regular Expression weakness
  • CWE-863 Incorrect Authorization weakness

References