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CVE-2026-45720

Omni: TOCTOU race condition allows multiple concurrent uses of a single-use SAML session token PUBLISHED

Description (CNA)

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.

Affected (CNA)

Vendor / productVersions
siderolabs / omniaffected < 1.6.6; affected >= 1.7.0, < 1.7.3

CWE

CWE-294, CWE-367

References

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.