CVE-2026-45720

Omni manages Kubernetes on bare metal, virtual machines, or in a cloud. Prior to 1.6.6 and from 1.7.0 until 1.7.3, SAML.getSession in internal/pkg/auth/interceptor/saml.go checks SAMLAssertion.Used and marks it used in separate state operations. Concurrent requests carrying the same captured saml-session token can each observe the assertion as unused and obtain authentication as the victim before either update is visible. The attacker can invoke SAML-protected gRPC endpoints, use ConfirmPublicKey to create multiple persistent credentials tied to the victim, and generate audit entries attributed to the victim, with the resulting access potentially affecting confidentiality, integrity, and availability according to the victim's privileges. This issue is fixed in versions 1.6.6 and 1.7.3.

• CWE-294
• CWE-367

• https://github.com/siderolabs/omni/commit/272d3f4dd00e778b39fde09afde35575fe13ef13
• https://github.com/siderolabs/omni/commit/4c4c1e2d8226914f26774a309a91595f168ee921
• https://github.com/siderolabs/omni/commit/ced79da6c032d2103803eb53343d0916cc957d2a
• https://github.com/siderolabs/omni/pull/2816
• https://github.com/siderolabs/omni/releases/tag/v1.6.6
• https://github.com/siderolabs/omni/releases/tag/v1.7.3
• https://github.com/siderolabs/omni/security/advisories/GHSA-5x9f-6vg5-qg4m

Published

Sep 17, 2026

Last Modified

Sep 24, 2026

Status

Deferred

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
• Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
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