CVE-2022-24726

Istio is an open platform to connect, manage, and secure microservices. In affected versions the Istio control plane, istiod, is vulnerable to a request processing error, allowing a malicious attacker that sends a specially crafted message which results in the control plane crashing when the validating webhook for a cluster is exposed publicly. This endpoint is served over TLS port 15017, but does not require any authentication from the attacker. For simple installations, Istiod is typically only reachable from within the cluster, limiting the blast radius. However, for some deployments, especially [external istiod](https://istio.io/latest/docs/setup/install/external-controlplane/) topologies, this port is exposed over the public internet. This issue has been patched in versions 1.13.2, 1.12.5 and 1.11.8. Users are advised to upgrade. Users unable to upgrade should disable access to a validating webhook that is exposed to the public internet or restrict the set of IP addresses that can query it to a set of known, trusted entities.

• CWE-400
• CWE-400

• https://github.com/golang/go/issues/51112Issue Tracking, Patch, Third Party Advisory
• https://github.com/istio/istio/commit/6ca5055a4db6695ef5504eabdfde3799f2ea91fdPatch, Third Party Advisory
• https://github.com/istio/istio/security/advisories/GHSA-8w5h-qr4r-2h6gIssue Tracking, Third Party Advisory
• https://github.com/golang/go/issues/51112Issue Tracking, Patch, Third Party Advisory
• https://github.com/istio/istio/commit/6ca5055a4db6695ef5504eabdfde3799f2ea91fdPatch, Third Party Advisory
• https://github.com/istio/istio/security/advisories/GHSA-8w5h-qr4r-2h6gIssue Tracking, Third Party Advisory

Published

Mar 10, 2022

Last Modified

Jun 17, 2026

Status

Modified

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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