---
id: CVE-2026-45720
title: 'Omni manages Kubernetes on bare metal, virtual machines, or in a cloud'
summary: >-
  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 ope…
severity: high
cvss: 7
cvssVector: 'CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H'
cwe:
  - CWE-294
  - CWE-367
vendor: siderolabs
product: omni
affected:
  - omni < 1.6.6
  - 'omni >= 1.7.0, < 1.7.3'
published: '2026-09-17'
updated: '2026-09-17'
sourceUpdated: '2026-09-17T21:17:12.743'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-45720'
references:
  - url: >-
      https://github.com/siderolabs/omni/commit/272d3f4dd00e778b39fde09afde35575fe13ef13
    label: security-advisories@github.com
  - url: >-
      https://github.com/siderolabs/omni/commit/4c4c1e2d8226914f26774a309a91595f168ee921
    label: security-advisories@github.com
  - url: >-
      https://github.com/siderolabs/omni/commit/ced79da6c032d2103803eb53343d0916cc957d2a
    label: security-advisories@github.com
  - url: 'https://github.com/siderolabs/omni/pull/2816'
    label: security-advisories@github.com
  - url: 'https://github.com/siderolabs/omni/releases/tag/v1.6.6'
    label: security-advisories@github.com
  - url: 'https://github.com/siderolabs/omni/releases/tag/v1.7.3'
    label: security-advisories@github.com
  - url: 'https://github.com/siderolabs/omni/security/advisories/GHSA-5x9f-6vg5-qg4m'
    label: security-advisories@github.com
tags:
  - nvd
  - cve.org
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-09-17T20:21:30.412238Z'
ingestedAt: '2026-09-17T20:28:02.771Z'
epss: 0.00112
epssPercentile: 0.01556
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.