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HIGH

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

Published Sep 17, 2026

Description

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 products

Remediation

No remediation recorded yet.

Weaknesses (2)

References (8)

Change history (0)

No recorded changes yet.

Sources
CVE.org / MITRE
Status PUBLISHED
Assigner GitHub_M
Published Sep 17, 2026
Updated Sep 17, 2026
Reserved May 13, 2026
CISA Vulnrichment
Updated Sep 17, 2026
NVD
Status Received
Modified Sep 17, 2026
Red Hat
Severity n/a
Public date n/a
GHSA-5X9F-6VG5-QG4M