CVE-2025-59836: GO-2025-4021 - Omni is Vulnerable to DoS via Empty Create/Update Resource Requests in github.com/siderolabs/omni

CVE-2025-59836 · Severity: medium · CVSS 5.3 · Published 2025-10-13

Omni manages Kubernetes on bare metal, virtual machines, or in a cloud. Prior to 1.1.5 and 1.0.2, there is a nil pointer dereference vulnerability in the Omni Resource Service allows unauthenticated users to cause a server panic and denial of service by sending empty create/update resource requests through the API endpoints. The vulnerability exists in the isSensitiveSpec function which calls grpcomni.CreateResource without checking if the resource's metadata field is nil. When a resource is created with an empty Metadata field, the CreateResource function attempts to access resource.Metadata.Version causing a segmentation fault. This vulnerability is fixed in 1.1.5 and 1.0.2.

Technologies: github.com/siderolabs/omni (Go). Vendors: Go.

Quick answers

Is CVE-2025-59836 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2025-59836 being exploited in the wild.
How severe is CVE-2025-59836?
Medium severity, with a CVSS score of 5.3, published 13 October 2025.
Which products and versions are affected?
github.com/siderolabs/omni (Go) SEMVER:introduced=0,fixed=1.0.2,introduced=1.1.0-beta.0,fixed=1.1.5, SEMVER:introduced=1.1.0-beta.0,fixed=1.1.5.
Is there a fix for CVE-2025-59836?
Yes. github.com/siderolabs/omni (Go): upgrade to 1.1.5 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
Am I affected by CVE-2025-59836?
Check whether you run github.com/siderolabs/omni (Go) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

  • github.com/siderolabs/omni (Go): upgrade to 1.1.5 or later
    go get github.com/siderolabs/omni@v1.1.5

Affected products

  • github.com/siderolabs/omni (Go) SEMVER:introduced=0,fixed=1.0.2,introduced=1.1.0-beta.0,fixed=1.1.5, SEMVER:introduced=1.1.0-beta.0,fixed=1.1.5

Identifiers

  • CVE-2025-59836
  • GHSA-4p3p-cr38-v5xp
  • GO-2025-4021

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