Omni is Vulnerable to DoS via Empty Create/Update Resource Requests

CISA KEV is observed exploitation evidence. FIRST EPSS is a dated prediction of exploitation in the next 30 days. Missing scores are unknown. This collector requests predictions only for explicit CVE aliases in the public NuGet archive; Microsoft release views retain their existing prediction scope.

No collected risk observation for these identifiers. This does not establish absence of exploitation or a zero probability.

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.

Source published

13 Oct 2025 20:43:40 UTC

Source modified

14 Oct 2025 14:28:17 UTC

Observed here

23 Oct 2026 15:48:27 UTC

Source terms

CVE Program Terms of Use

Original source record · Cite this exact observation · Complete original publisher JSON

This view projects the publisher's source fields for reading; the original JSON retains additional fields and CVE enrichment containers. Attribution: cve-program · CVE Program Terms of Use. Source text is retained; field grouping and change labels are provided by ChangeIntel.

CVSS 3.1 · 5.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

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.

Source published

Oct 13, 2025, 8:43:40 PM (timezone not stated)

Source modified

Oct 14, 2025, 2:28:17 PM (timezone not stated)

Observed here

11 Nov 2026 04:28:04 UTC

Source terms

ENISA EUVD · source terms and attribution apply

Original source record · Cite this exact observation · Complete original publisher JSON

This view projects the publisher's source fields for reading; the original JSON retains additional fields and CVE enrichment containers. Attribution: euvd · ENISA EUVD · source terms and attribution apply. Source text is retained; field grouping and change labels are provided by ChangeIntel.

EUVD CVSS 3.1 · 5.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

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.

Source published

13 Oct 2025 21:15:34 UTC

Source modified

8 Oct 2026 12:10:00 UTC

Observed here

25 Oct 2026 03:17:27 UTC

Source terms

NIST NVD usage terms; underlying source attribution retained

Original source record · Cite this exact observation · Complete original publisher JSON

This view projects the publisher's source fields for reading; the original JSON retains additional fields and CVE enrichment containers. Attribution: nvd · NIST NVD usage terms; underlying source attribution retained. Source text is retained; field grouping and change labels are provided by ChangeIntel.

CVSS 3.1 · [email protected] · Secondary · 5.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

CVSS 3.1 · [email protected] · Primary · 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

## Summary 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. ## Details 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. ### Vulnerable Code The `isSensitiveSpec` function in `/src/internal/backend/server.go`: ```go func isSensitiveSpec(resource *resapi.Resource) bool { res, err := grpcomni.CreateResource(resource) // No nil check on resource.Metadata if err != nil { return false } // ... rest of function } ``` The `CreateResource` function expects `resource.Metadata` to be non-nil: ```go func CreateResource(resource *resources.Resource) (cosiresource.Resource, error) { if resource.Metadata.Version == "" { // PANIC: nil pointer dereference resource.Metadata.Version = "1" } // ... rest of function } ``` The `UpdateResource` function has the same issue - it also calls `CreateResource` internally and expects `resource.Metadata` to be non-nil: ```go func (s *ResourceServer) Update(ctx context.Context, in *resapi.UpdateRequest) (*resapi.UpdateResponse, error) { // ... validation code ... obj, err := CreateResource(in.Resource) // Same vulnerability here if err != nil { return nil, err } // ... rest of function } ``` ### Affected Endpoints - `resourceServerCreate` - Create Resource API endpoint - `resourceServerUpdate` - Update Resource API endpoint Both endpoints call `isSensitiveSpec` which triggers the vulnerability when processing empty resources. ## PoC Send empty resource requests to the affected API endpoints: ```bash # Create endpoint curl -X POST "https://your-omni-instance/api/omni.resources.ResourceService/Create" \ -H "Content-Type: application/json" \ -d '{}' # Update endpoint curl -X POST "https://your-omni-instance/api/omni.resources.ResourceService/Update" \ -H "Content-Type: application/json" \ -d '{}' ``` **Expected Result**: Server panic with segmentation fault: ``` panic: runtime error: invalid memory address or nil pointer dereference [signal SIGSEGV: segmentation violation code=0x1 addr=0x8 pc=0x293d970] goroutine 3305 [running]: github.com/siderolabs/omni/internal/backend/grpc.CreateResource(0x3495420?) /src/internal/backend/grpc/resource.go:364 +0x20 ``` ## Impact - **Vulnerability Type**: Denial of Service (DoS) - **Severity**: High - Complete API server crash requiring manual restart if no restart policy is applied. - **Authentication**: None required (unauthenticated) - **Complexity**: Low (simple HTTP request) ## Mitigation Add nil checks in the `isSensitiveSpec` function: ```go func isSensitiveSpec(resource *resapi.Resource) bool { if resource == nil || resource.Metadata == nil { return false } res, err := grpcomni.CreateResource(resource) if err != nil { return false } // ... rest of function } ``` ## Credits - @1c3t0rm - @nicomda

Source published

13 Oct 2025 19:59:17 UTC

Source modified

5 Nov 2025 22:07:29 UTC

Observed here

24 Oct 2026 13:19:41 UTC

Source terms

GitHub Advisory Database · CC-BY-4.0

Original source record · Cite this exact observation · Complete original publisher JSON

This view projects the publisher's source fields for reading; the original JSON retains additional fields and CVE enrichment containers. Attribution: osv · GitHub Advisory Database · CC-BY-4.0. Source text is retained; field grouping and change labels are provided by ChangeIntel.

CVSS_V3 · CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Publisher rating · MODERATE

Omni is Vulnerable to DoS via Empty Create/Update Resource Requests in github.com/siderolabs/omni

Source published

5 Nov 2025 18:41:15 UTC

Source modified

3 Mar 2026 04:56:59 UTC

Observed here

24 Oct 2026 13:19:41 UTC

Source terms

OSV · upstream source license applies

Original source record · Cite this exact observation · Complete original publisher JSON

This view projects the publisher's source fields for reading; the original JSON retains additional fields and CVE enrichment containers. Attribution: osv · OSV · upstream source license applies. Source text is retained; field grouping and change labels are provided by ChangeIntel.