Vulnerability-Lookup

CNVD-2026-37846

Vulnerability from cnvd - Published: 2026-09-14

Title

free5GC类型混淆漏洞

Description

free5GC是一个‌开源5G核心网项目‌，由Linux基金会托管，目标是实现3GPPRelease15及后续版本定义的5G核心网络功能。 free5GC存在类型混淆漏洞，该漏洞源于NRF的POST /oauth2/token端点处理函数未能正确处理表单解析中的类型验证，攻击者可利用该漏洞通过发送单个未经验证的表单编码请求远程触发panic，造成拒绝服务。

Severity

高

Patch Name

free5GC类型混淆漏洞的补丁

Patch Description

Formal description

目前厂商已发布升级程序修复该安全问题，详情见厂商官网: https://free5gc.org/

Reference

https://github.com/free5gc/free5gc/security/advisories/GHSA-f8qv-7x5w-qr48

Impacted products

Name
free5GC free5GC <4.2.2

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JSON

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{
  "cves": {
    "cve": {
      "cveNumber": "CVE-2026-44325",
      "cveUrl": "https://nvd.nist.gov/vuln/detail/CVE-2026-44325"
    }
  },
  "description": "free5GC\u662f\u4e00\u4e2a\u200c\u5f00\u6e905G\u6838\u5fc3\u7f51\u9879\u76ee\u200c\uff0c\u7531Linux\u57fa\u91d1\u4f1a\u6258\u7ba1\uff0c\u76ee\u6807\u662f\u5b9e\u73b03GPPRelease15\u53ca\u540e\u7eed\u7248\u672c\u5b9a\u4e49\u76845G\u6838\u5fc3\u7f51\u7edc\u529f\u80fd\u3002\n\nfree5GC\u5b58\u5728\u7c7b\u578b\u6df7\u6dc6\u6f0f\u6d1e\uff0c\u8be5\u6f0f\u6d1e\u6e90\u4e8eNRF\u7684POST /oauth2/token\u7aef\u70b9\u5904\u7406\u51fd\u6570\u672a\u80fd\u6b63\u786e\u5904\u7406\u8868\u5355\u89e3\u6790\u4e2d\u7684\u7c7b\u578b\u9a8c\u8bc1\uff0c\u653b\u51fb\u8005\u53ef\u5229\u7528\u8be5\u6f0f\u6d1e\u901a\u8fc7\u53d1\u9001\u5355\u4e2a\u672a\u7ecf\u9a8c\u8bc1\u7684\u8868\u5355\u7f16\u7801\u8bf7\u6c42\u8fdc\u7a0b\u89e6\u53d1panic\uff0c\u9020\u6210\u62d2\u7edd\u670d\u52a1\u3002",
  "formalWay": "\u76ee\u524d\u5382\u5546\u5df2\u53d1\u5e03\u5347\u7ea7\u7a0b\u5e8f\u4fee\u590d\u8be5\u5b89\u5168\u95ee\u9898\uff0c\u8be6\u60c5\u89c1\u5382\u5546\u5b98\u7f51:\r\nhttps://free5gc.org/",
  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2026-37846",
  "openTime": "2026-09-14",
  "patchDescription": "free5GC\u662f\u4e00\u4e2a\u200c\u5f00\u6e905G\u6838\u5fc3\u7f51\u9879\u76ee\u200c\uff0c\u7531Linux\u57fa\u91d1\u4f1a\u6258\u7ba1\uff0c\u76ee\u6807\u662f\u5b9e\u73b03GPPRelease15\u53ca\u540e\u7eed\u7248\u672c\u5b9a\u4e49\u76845G\u6838\u5fc3\u7f51\u7edc\u529f\u80fd\u3002\r\n\r\nfree5GC\u5b58\u5728\u7c7b\u578b\u6df7\u6dc6\u6f0f\u6d1e\uff0c\u8be5\u6f0f\u6d1e\u6e90\u4e8eNRF\u7684POST /oauth2/token\u7aef\u70b9\u5904\u7406\u51fd\u6570\u672a\u80fd\u6b63\u786e\u5904\u7406\u8868\u5355\u89e3\u6790\u4e2d\u7684\u7c7b\u578b\u9a8c\u8bc1\uff0c\u653b\u51fb\u8005\u53ef\u5229\u7528\u8be5\u6f0f\u6d1e\u901a\u8fc7\u53d1\u9001\u5355\u4e2a\u672a\u7ecf\u9a8c\u8bc1\u7684\u8868\u5355\u7f16\u7801\u8bf7\u6c42\u8fdc\u7a0b\u89e6\u53d1panic\uff0c\u9020\u6210\u62d2\u7edd\u670d\u52a1\u3002\u76ee\u524d\uff0c\u4f9b\u5e94\u5546\u53d1\u5e03\u4e86\u5b89\u5168\u516c\u544a\u53ca\u76f8\u5173\u8865\u4e01\u4fe1\u606f\uff0c\u4fee\u590d\u4e86\u6b64\u6f0f\u6d1e\u3002",
  "patchName": "free5GC\u7c7b\u578b\u6df7\u6dc6\u6f0f\u6d1e\u7684\u8865\u4e01",
  "products": {
    "product": "free5GC free5GC \u003c4.2.2"
  },
  "referenceLink": "https://github.com/free5gc/free5gc/security/advisories/GHSA-f8qv-7x5w-qr48",
  "serverity": "\u9ad8",
  "submitTime": "2026-05-28",
  "title": "free5GC\u7c7b\u578b\u6df7\u6dc6\u6f0f\u6d1e"
}

CVE-2026-44325 (GCVE-0-2026-44325)

Vulnerability from cvelistv5 – Published: 2026-05-27 15:43 – Updated: 2026-05-27 17:50

Title

free5GC: NRF POST /oauth2/token structured-form parser type-confusion panic family (Reflect.Set on incompatible types)

Summary

free5GC is an open-source implementation of the 5G core network. Prior to 4.2.2, free5GC's NRF root SBI endpoint POST /oauth2/token contains a parser-level type-confusion bug family. The handler in NFs/nrf/internal/sbi/api_accesstoken.go reflects over models.NrfAccessTokenAccessTokenReq, special-cases only plain string and NrfNfManagementNfType fields, and treats every other field as if it were a single models.PlmnId. The parsed *models.PlmnId is then assigned with reflect.Value.Set() to whichever field name the attacker put in the form body, which panics whenever the destination field's real type is incompatible (slice, different struct, primitive). Gin recovery converts each panic into HTTP 500, but the endpoint remains remotely panicable from a single unauthenticated form-encoded request and is repeatedly triggerable. This vulnerability is fixed in 4.2.2.

Severity

7.5 (High)


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

SSVC

Exploitation: poc Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-05-27 17:50 UTC

CWE

CWE-20 - Improper Input Validation
CWE-755 - Improper Handling of Exceptional Conditions
CWE-843 - Access of Resource Using Incompatible Type ('Type Confusion')

Assigner

GitHub_M mitre root

References

4 references

URL	Tags
https://github.com/free5gc/free5gc/security/advis…	x_refsource_CONFIRM
https://github.com/free5gc/free5gc/issues/918	x_refsource_MISC
https://github.com/free5gc/nrf/pull/83	x_refsource_MISC
https://github.com/free5gc/nrf/commit/f7bc77daa74…	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
free5gc	free5gc	Affected: < 4.2.2

Show details on NVD website

JSON

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{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-44325",
                "options": [
                  {
                    "Exploitation": "poc"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-05-27T17:50:19.740036Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-05-27T17:50:51.669Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "references": [
          {
            "tags": [
              "exploit"
            ],
            "url": "https://github.com/free5gc/free5gc/security/advisories/GHSA-f8qv-7x5w-qr48"
          }
        ],
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "free5gc",
          "vendor": "free5gc",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 4.2.2"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "free5GC is an open-source implementation of the 5G core network. Prior to 4.2.2, free5GC\u0027s NRF root SBI endpoint POST /oauth2/token contains a parser-level type-confusion bug family. The handler in NFs/nrf/internal/sbi/api_accesstoken.go reflects over models.NrfAccessTokenAccessTokenReq, special-cases only plain string and NrfNfManagementNfType fields, and treats every other field as if it were a single models.PlmnId. The parsed *models.PlmnId is then assigned with reflect.Value.Set() to whichever field name the attacker put in the form body, which panics whenever the destination field\u0027s real type is incompatible (slice, different struct, primitive). Gin recovery converts each panic into HTTP 500, but the endpoint remains remotely panicable from a single unauthenticated form-encoded request and is repeatedly triggerable. This vulnerability is fixed in 4.2.2."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
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              "lang": "en",
              "type": "CWE"
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        },
        {
          "descriptions": [
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              "cweId": "CWE-755",
              "description": "CWE-755: Improper Handling of Exceptional Conditions",
              "lang": "en",
              "type": "CWE"
            }
          ]
        },
        {
          "descriptions": [
            {
              "cweId": "CWE-843",
              "description": "CWE-843: Access of Resource Using Incompatible Type (\u0027Type Confusion\u0027)",
              "lang": "en",
              "type": "CWE"
            }
          ]
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      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-27T15:43:34.136Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
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      },
      "references": [
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          "name": "https://github.com/free5gc/free5gc/security/advisories/GHSA-f8qv-7x5w-qr48",
          "tags": [
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          ],
          "url": "https://github.com/free5gc/free5gc/security/advisories/GHSA-f8qv-7x5w-qr48"
        },
        {
          "name": "https://github.com/free5gc/free5gc/issues/918",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/free5gc/free5gc/issues/918"
        },
        {
          "name": "https://github.com/free5gc/nrf/pull/83",
          "tags": [
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          "url": "https://github.com/free5gc/nrf/pull/83"
        },
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          "name": "https://github.com/free5gc/nrf/commit/f7bc77daa7425506af7569f2e61c2a210f5a0423",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/free5gc/nrf/commit/f7bc77daa7425506af7569f2e61c2a210f5a0423"
        }
      ],
      "source": {
        "advisory": "GHSA-f8qv-7x5w-qr48",
        "discovery": "UNKNOWN"
      },
      "title": "free5GC: NRF POST /oauth2/token structured-form parser type-confusion panic family (Reflect.Set on incompatible types)"
    }
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  "cveMetadata": {
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    "assignerShortName": "GitHub_M",
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    "datePublished": "2026-05-27T15:43:34.136Z",
    "dateReserved": "2026-05-05T19:00:06.023Z",
    "dateUpdated": "2026-05-27T17:50:51.669Z",
    "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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CNVD-2026-37846

CVE-2026-44325 (GCVE-0-2026-44325)

Tags

Sightings

Nomenclature

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