Vulnerability-Lookup

CVE-2026-45723 (GCVE-0-2026-45723)

Vulnerability from cvelistv5 – Published: 2026-09-17 19:39 – Updated: 2026-09-18 20:13

Title

Omni: Operator can traverse image-factory API paths via unsanitized `talos_version` in CreateSchematic

Summary

Omni manages Kubernetes on bare metal, virtual machines, or in a cloud. Prior to 1.6.6 and 1.7.3, managementServer.CreateSchematic in internal/backend/grpc/schematics.go passes the caller-controlled TalosVersion field to imageFactoryClient.OverlaysVersions without validating it as a version. An authenticated Operator can submit traversal segments in TalosVersion, and url.URL.JoinPath normalizes them into unintended paths on the configured image-factory host. Omni then issues HTTP GET requests to those paths and reflects error-body content, enabling same-host endpoint probing and possible disclosure of internal diagnostics while preventing redirection to another host or write requests. This issue is fixed in versions 1.6.6 and 1.7.3.

Severity

2.7 (Low)


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

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-09-18 20:10 UTC

CWE

CWE-20 - Improper Input Validation
CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
CWE-209 - Generation of Error Message Containing Sensitive Information
CWE-441 - Unintended Proxy or Intermediary ('Confused Deputy')
CWE-918 - Server-Side Request Forgery (SSRF)

Assigner

GitHub_M mitre root

References

7 references

URL	Tags
https://github.com/siderolabs/omni/security/advis…	x_refsource_CONFIRM
https://github.com/siderolabs/omni/pull/2817	x_refsource_MISC
https://github.com/siderolabs/omni/commit/13c3f28…	x_refsource_MISC
https://github.com/siderolabs/omni/commit/3e69e80…	x_refsource_MISC
https://github.com/siderolabs/omni/commit/9426c2c…	x_refsource_MISC
https://github.com/siderolabs/omni/releases/tag/v1.6.6	x_refsource_MISC
https://github.com/siderolabs/omni/releases/tag/v1.7.3	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version	CPE status
siderolabs	omni	Affected: < 1.6.6 Affected: >= 1.7.0, < 1.7.3	guessed

Show details on NVD website

JSON

To clipboard

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}

FKIE_CVE-2026-45723

Vulnerability from fkie_nvd - Published: 2026-09-17 20:16 - Updated: 2026-09-18 21:16

Severity

2.7 (Low) - CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:N/A:N

Summary

References

	URL	Tags
	security-advisories@github.com	https://github.com/siderolabs/omni/commit/13c3f289789842e1fd954d98babb34b94eea1192
	security-advisories@github.com	https://github.com/siderolabs/omni/commit/3e69e80802624bf322f16aa499d5eafca16d0025
	security-advisories@github.com	https://github.com/siderolabs/omni/commit/9426c2cabccaa1d442bc8ebf28c16cae2d7c6ff7
	security-advisories@github.com	https://github.com/siderolabs/omni/pull/2817
	security-advisories@github.com	https://github.com/siderolabs/omni/releases/tag/v1.6.6
	security-advisories@github.com	https://github.com/siderolabs/omni/releases/tag/v1.7.3
	security-advisories@github.com	https://github.com/siderolabs/omni/security/advisories/GHSA-c66c-vq6w-fvh5

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "omni",
          "vendor": "siderolabs",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 1.6.6"
            },
            {
              "status": "affected",
              "version": "\u003e= 1.7.0, \u003c 1.7.3"
            }
          ]
        }
      ],
      "source": "security-advisories@github.com"
    }
  ],
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    {
      "lang": "en",
      "value": "Omni manages Kubernetes on bare metal, virtual machines, or in a cloud. Prior to 1.6.6 and 1.7.3, managementServer.CreateSchematic in internal/backend/grpc/schematics.go passes the caller-controlled TalosVersion field to imageFactoryClient.OverlaysVersions without validating it as a version. An authenticated Operator can submit traversal segments in TalosVersion, and url.URL.JoinPath normalizes them into unintended paths on the configured image-factory host. Omni then issues HTTP GET requests to those paths and reflects error-body content, enabling same-host endpoint probing and possible disclosure of internal diagnostics while preventing redirection to another host or write requests. This issue is fixed in versions 1.6.6 and 1.7.3."
    }
  ],
  "id": "CVE-2026-45723",
  "lastModified": "2026-09-18T21:16:59.470",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 2.7,
          "baseSeverity": "LOW",
          "confidentialityImpact": "LOW",
          "integrityImpact": "NONE",
          "privilegesRequired": "HIGH",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:N/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 1.2,
        "impactScore": 1.4,
        "source": "security-advisories@github.com",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-45723",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-09-18T20:10:42.448358Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-09-17T20:16:49.347",
  "references": [
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/siderolabs/omni/commit/13c3f289789842e1fd954d98babb34b94eea1192"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/siderolabs/omni/commit/3e69e80802624bf322f16aa499d5eafca16d0025"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/siderolabs/omni/commit/9426c2cabccaa1d442bc8ebf28c16cae2d7c6ff7"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/siderolabs/omni/pull/2817"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/siderolabs/omni/releases/tag/v1.6.6"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/siderolabs/omni/releases/tag/v1.7.3"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/siderolabs/omni/security/advisories/GHSA-c66c-vq6w-fvh5"
    }
  ],
  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Received",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-20"
        },
        {
          "lang": "en",
          "value": "CWE-22"
        },
        {
          "lang": "en",
          "value": "CWE-209"
        },
        {
          "lang": "en",
          "value": "CWE-441"
        },
        {
          "lang": "en",
          "value": "CWE-918"
        }
      ],
      "source": "security-advisories@github.com",
      "type": "Secondary"
    }
  ]
}

GHSA-C66C-VQ6W-FVH5

Vulnerability from github – Published: 2026-06-05 15:25 – Updated: 2026-06-05 15:25

Summary

Omni: Operator can traverse image-factory API paths via unsanitized `talos_version` in CreateSchematic

Details

Summary

managementServer.CreateSchematic (internal/backend/grpc/schematics.go) passes the caller-controlled TalosVersion field directly to imageFactoryClient.OverlaysVersions, which embeds it verbatim into a fmt.Sprintf("/version/%s/overlays/official", talosVersion) path template. url.URL.JoinPath resolves any ../ sequences in that path, allowing an authenticated Operator to rewrite the URL path and force Omni to issue HTTP GET requests to unintended paths on the configured image-factory server. Error body content from those unintended endpoints is returned to the caller.

Severity

Attack Vector: Network: exploited via the gRPC CreateSchematic API endpoint.
Attack Complexity: Low: once the attacker holds an Operator credential and has identified a media ID with an overlay, exploitation is a single API call.
Privileges Required: High: role.Operator is required, which has administrative capabilities on Omni.
User Interaction: None.
Scope: Unchanged: the traversal is constrained to the configured image-factory host; the attacker cannot redirect Omni to an arbitrary external server.
Confidentiality Impact: Low: error body content from unintended image-factory endpoints is reflected back to the operator, potentially leaking server-internal information.
Integrity Impact: None: only HTTP GET requests are issued; no write operations are performed.
Availability Impact: None.

Impact

Same-host path traversal: An authenticated Operator can force Omni to issue GET requests to arbitrary URL paths on the configured image-factory server, bypassing the intended versioned overlay API structure.
Error-body disclosure: HTTP error responses from unintended image-factory endpoints are reflected back to the operator, potentially leaking server-internal diagnostics or sensitive path content.
Internal network probing: In deployments using a private image-factory instance on an internal network, the attacker can probe endpoint existence and partial responses through error-text differences.
Depth control: By varying the number of ../ prefixes in talosVersion, the attacker can reach any path hierarchy on the image-factory host.

Credit

This vulnerability was discovered and reported by bugbunny.ai.

Severity

2.7 (Low)


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

Show details on source website

JSON

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{
  "affected": [
    {
      "package": {
        "ecosystem": "Go",
        "name": "github.com/siderolabs/omni"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.6.6"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Go",
        "name": "github.com/siderolabs/omni"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "1.7.0"
            },
            {
              "fixed": "1.7.3"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-45723"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-20",
      "CWE-209",
      "CWE-22",
      "CWE-441",
      "CWE-918"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-06-05T15:25:58Z",
    "nvd_published_at": null,
    "severity": "LOW"
  },
  "details": "## Summary\n\n`managementServer.CreateSchematic` (`internal/backend/grpc/schematics.go`) passes the caller-controlled `TalosVersion` field directly to `imageFactoryClient.OverlaysVersions`, which embeds it verbatim into a `fmt.Sprintf(\"/version/%s/overlays/official\", talosVersion)` path template. `url.URL.JoinPath` resolves any `../` sequences in that path, allowing an authenticated Operator to rewrite the URL path and force Omni to issue HTTP GET requests to unintended paths on the configured image-factory server. Error body content from those unintended endpoints is returned to the caller.\n\n## Severity\n\n- **Attack Vector:** Network: exploited via the gRPC `CreateSchematic` API endpoint.\n- **Attack Complexity:** Low: once the attacker holds an Operator credential and has identified a media ID with an overlay, exploitation is a single API call.\n- **Privileges Required:** High: `role.Operator` is required, which has administrative capabilities on Omni.\n- **User Interaction:** None.\n- **Scope:** Unchanged: the traversal is constrained to the configured image-factory host; the attacker cannot redirect Omni to an arbitrary external server.\n- **Confidentiality Impact:** Low: error body content from unintended image-factory endpoints is reflected back to the operator, potentially leaking server-internal information.\n- **Integrity Impact:** None: only HTTP GET requests are issued; no write operations are performed.\n- **Availability Impact:** None.\n\n## Impact\n\n- **Same-host path traversal**: An authenticated Operator can force Omni to issue GET requests to arbitrary URL paths on the configured image-factory server, bypassing the intended versioned overlay API structure.\n- **Error-body disclosure**: HTTP error responses from unintended image-factory endpoints are reflected back to the operator, potentially leaking server-internal diagnostics or sensitive path content.\n- **Internal network probing**: In deployments using a private image-factory instance on an internal network, the attacker can probe endpoint existence and partial responses through error-text differences.\n- **Depth control**: By varying the number of `../` prefixes in `talosVersion`, the attacker can reach any path hierarchy on the image-factory host.\n\n## Credit\nThis vulnerability was discovered and reported by [bugbunny.ai](https://bugbunny.ai).",
  "id": "GHSA-c66c-vq6w-fvh5",
  "modified": "2026-06-05T15:25:58Z",
  "published": "2026-06-05T15:25:58Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/siderolabs/omni/security/advisories/GHSA-c66c-vq6w-fvh5"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/siderolabs/omni"
    },
    {
      "type": "WEB",
      "url": "https://github.com/siderolabs/omni/releases/tag/v1.6.6"
    },
    {
      "type": "WEB",
      "url": "https://github.com/siderolabs/omni/releases/tag/v1.7.3"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:N/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Omni: Operator can traverse image-factory API paths via unsanitized `talos_version` in CreateSchematic"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

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Action not permitted

CVE-2026-45723 (GCVE-0-2026-45723)

FKIE_CVE-2026-45723

GHSA-C66C-VQ6W-FVH5

Summary

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