Instituto Nacional de ciberseguridad. Sección Incibe
Instituto Nacional de Ciberseguridad. Sección INCIBE-CERT

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CVE-2026-23766

Severity CVSS v4.0:
Pending analysis
Type:
Unavailable / Other
Publication date:
15/01/2026
Last modified:
15/01/2026

Description

Istio through 1.28.2 allows iptables rule injection for changing firewall behavior via the traffic.sidecar.istio.io/excludeInterfaces annotation. NOTE: the reporter's position is "this doesn't represent a security vulnerability (pod creators can already exclude sidecar injection entirely)."

Impact

Vector 3.x
CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:C/C:N/I:L/A:N CVSS v3.1 Severity and Metrics:

Base Score: 4.10 MEDIUM
Vector: CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:C/C:N/I:L/A:N

Attack Vector (AV): Adjacent
Attack Complexity (AC): Low
Privileges Required (PR): Low
User Interaction (UI): None
Scope (S): Changed
Confidentiality (C): None
Integrity (I): Low
Availability (A): None

Base Score 3.x
4.10
Severity 3.x
MEDIUM

References to Advisories, Solutions, and Tools