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)."

Metrics

No CVSS v4.0

Attack Vector Adjacent Network

Attack Complexity Low

Privileges Required Low

Scope Changed

Confidentiality Impact None

Integrity Impact Low

Availability Impact None

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

The EPSS score is 0.00019.

Exploitation none

Automatable no

Technical Impact partial

Affected Vendors & Products

Vendors Products
Istio Subscribe
Istio Subscribe

No data.

No data.

OpenCVE Enrichment is a feature of OpenCVE that uses AI to automatically link vendors and products to CVEs. Learn more on GitHub.

Vendors Products
Istio Subscribe
Istio Subscribe
Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://github.com/istio/istio/issues/58781 cve-icon cve-icon cve-icon
https://github.com/istio/istio/pull/58785 cve-icon cve-icon cve-icon
https://nvd.nist.gov/vuln/detail/CVE-2026-23766 cve-icon
https://www.cve.org/CVERecord?id=CVE-2026-23766 cve-icon
History

Mon, 19 Jan 2026 00:15:00 +0000

Type Values Removed Values Added
Title istio: From CVEorg collector
References
Metrics threat_severity

None

 threat_severity

Low

Fri, 16 Jan 2026 14:15:00 +0000

Type Values Removed Values Added
First Time appeared Istio
Istio istio
Vendors & Products Istio
Istio istio

Thu, 15 Jan 2026 20:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Thu, 15 Jan 2026 19:45:00 +0000

Type Values Removed Values Added
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)."
Weaknesses CWE-88
References
Metrics cvssV3_1

{'score': 4.1, 'vector': 'CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:C/C:N/I:L/A:N'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: mitre

Published:

Updated: 2026-01-15T19:47:53.919Z

Reserved: 2026-01-15T19:18:50.553Z

Link: CVE-2026-23766

cve-icon Vulnrichment

Updated: 2026-01-15T19:47:42.641Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-01-15T20:16:06.057

Modified: 2026-01-16T15:55:12.257

Link: CVE-2026-23766

cve-icon Redhat

Severity : Low

Publid Date: 2026-01-15T19:18:50Z

Links: CVE-2026-23766 - Bugzilla

cve-icon OpenCVE Enrichment

Updated: 2026-01-16T13:42:54Z

Weaknesses