Vulnerability-Lookup

GHSA-QFXW-V8QX-VJ3V

Vulnerability from github – Published: 2026-05-11 15:18 – Updated: 2026-06-08 23:48

Summary

Ella Core Vulnerable to UE Downlink Redirection via Forged PDUSessionResourceSetupResponse

Details

Summary

A radio with a valid NG Setup can send a forged PDUSessionResourceSetupResponse carrying any UE's AMF-UE-NGAP-ID. Ella Core does not verify the message arrived on the SCTP association bound to that UE's logical NG-connection, then creates a GTP tunnel towards that radio.

Impact

Downlink user-plane traffic for the targeted UE is redirected to the attacker's radio.

Fix

UE context lookups are now scoped to the sending radio's SCTP association.

Severity

7.1 (High)


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

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{
  "affected": [
    {
      "package": {
        "ecosystem": "Go",
        "name": "github.com/ellanetworks/core"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.10.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-44473"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-358",
      "CWE-863"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-05-11T15:18:47Z",
    "nvd_published_at": "2026-05-27T17:16:39Z",
    "severity": "HIGH"
  },
  "details": "## Summary\n\nA radio with a valid NG Setup can send a forged PDUSessionResourceSetupResponse carrying any UE\u0027s AMF-UE-NGAP-ID. Ella Core does not verify the message arrived on the SCTP association bound to that UE\u0027s logical NG-connection, then creates a GTP tunnel towards that radio.\n\n## Impact\n\nDownlink user-plane traffic for the targeted UE is redirected to the attacker\u0027s radio.\n\n## Fix\n\nUE context lookups are now scoped to the sending radio\u0027s SCTP association.",
  "id": "GHSA-qfxw-v8qx-vj3v",
  "modified": "2026-06-08T23:48:51Z",
  "published": "2026-05-11T15:18:47Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/ellanetworks/core/security/advisories/GHSA-qfxw-v8qx-vj3v"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-44473"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/ellanetworks/core"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Ella Core Vulnerable to UE Downlink Redirection via Forged PDUSessionResourceSetupResponse"
}

CVE-2026-44473 (GCVE-0-2026-44473)

Vulnerability from cvelistv5 – Published: 2026-05-27 15:16 – Updated: 2026-05-28 14:33

Title

Ella Core: UE Downlink Redirection via Forged PDUSessionResourceSetupResponse

Summary

Ella Core is a 5G core designed for private networks. Prior to 1.10.0, a radio with a valid NG Setup can send a forged PDUSessionResourceSetupResponse carrying any UE's AMF-UE-NGAP-ID. Ella Core does not verify the message arrived on the SCTP association bound to that UE's logical NG-connection, then creates a GTP tunnel towards that radio. This vulnerability is fixed in 1.10.0.

Severity

7.1 (High)


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

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-05-28 14:33 UTC

CWE

CWE-358 - Improperly Implemented Security Check for Standard
CWE-863 - Incorrect Authorization

Assigner

GitHub_M mitre root Scorecard

References

1 reference

URL	Tags
https://github.com/ellanetworks/core/security/adv…	x_refsource_CONFIRM

Impacted products

1 product

Vendor	Product	Version
ellanetworks	core	Affected: < 1.10.0

Show details on NVD website

JSON

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{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-44473",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-05-28T14:33:19.699329Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-05-28T14:33:35.170Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "core",
          "vendor": "ellanetworks",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 1.10.0"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "Ella Core is a 5G core designed for private networks. Prior to 1.10.0, a radio with a valid NG Setup can send a forged PDUSessionResourceSetupResponse carrying any UE\u0027s AMF-UE-NGAP-ID. Ella Core does not verify the message arrived on the SCTP association bound to that UE\u0027s logical NG-connection, then creates a GTP tunnel towards that radio. This vulnerability is fixed in 1.10.0."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "ADJACENT_NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 7.1,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "LOW",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-358",
              "description": "CWE-358: Improperly Implemented Security Check for Standard",
              "lang": "en",
              "type": "CWE"
            }
          ]
        },
        {
          "descriptions": [
            {
              "cweId": "CWE-863",
              "description": "CWE-863: Incorrect Authorization",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-27T15:16:05.261Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/ellanetworks/core/security/advisories/GHSA-qfxw-v8qx-vj3v",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/ellanetworks/core/security/advisories/GHSA-qfxw-v8qx-vj3v"
        }
      ],
      "source": {
        "advisory": "GHSA-qfxw-v8qx-vj3v",
        "discovery": "UNKNOWN"
      },
      "title": "Ella Core: UE Downlink Redirection via Forged PDUSessionResourceSetupResponse"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-44473",
    "datePublished": "2026-05-27T15:16:05.261Z",
    "dateReserved": "2026-05-06T17:18:51.782Z",
    "dateUpdated": "2026-05-28T14:33:35.170Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

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.

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

GHSA-QFXW-V8QX-VJ3V

Summary

Impact

Fix

CVE-2026-44473 (GCVE-0-2026-44473)

Tags

Sightings

Nomenclature

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