CVE-2026-32696 (GCVE-0-2026-32696)
Vulnerability from cvelistv5
Published
2026-03-30 20:11
Modified
2026-03-31 15:24
Severity ?
3.1 (Low) - CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:L
CWE
  • CWE-476 - NULL Pointer Dereference
Summary
NanoMQ MQTT Broker (NanoMQ) is an all-around Edge Messaging Platform. In NanoMQ version 0.24.6, after enabling auth.http_auth (HTTP authentication), when a client connects to the broker using MQTT CONNECT without providing username/password, and the configuration params uses the placeholders %u / %P (e.g., username="%u", password="%P"), the HTTP request construction phase enters auth_http.c:set_data(). This results in calling strlen() on a NULL pointer, causing a SIGSEGV crash. This crash can be triggered remotely, resulting in a denial of service. This issue has been patched in version 0.24.7.
References
Impacted products
Vendor Product Version
nanomq nanomq Version: >= 0.24.6, < 0.24.7
 Create a notification for this product.
Show details on NVD website

To clipboard 

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-32696",
                "options": [
                  {
                    "Exploitation": "poc"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-03-31T15:23:56.365413Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-03-31T15:24:06.506Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "nanomq",
          "vendor": "nanomq",
          "versions": [
            {
              "status": "affected",
              "version": "\u003e= 0.24.6, \u003c 0.24.7"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "NanoMQ MQTT Broker (NanoMQ) is an all-around Edge Messaging Platform. In NanoMQ version 0.24.6, after enabling auth.http_auth (HTTP authentication), when a client connects to the broker using MQTT CONNECT without providing username/password, and the configuration params uses the placeholders %u / %P (e.g., username=\"%u\", password=\"%P\"), the HTTP request construction phase enters auth_http.c:set_data(). This results in calling strlen() on a NULL pointer, causing a SIGSEGV crash. This crash can be triggered remotely, resulting in a denial of service. This issue has been patched in version 0.24.7."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "HIGH",
            "attackVector": "NETWORK",
            "availabilityImpact": "LOW",
            "baseScore": 3.1,
            "baseSeverity": "LOW",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "REQUIRED",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:L",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-476",
              "description": "CWE-476: NULL Pointer Dereference",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-03-30T20:11:30.580Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/nanomq/nanomq/security/advisories/GHSA-77f4-wvq8-mp3p",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/nanomq/nanomq/security/advisories/GHSA-77f4-wvq8-mp3p"
        },
        {
          "name": "https://github.com/nanomq/NanoNNG/pull/1394",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/nanomq/NanoNNG/pull/1394"
        },
        {
          "name": "https://github.com/nanomq/NanoNNG/commit/c20aa27e5290bb480a5315099952480d35f37a8b",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/nanomq/NanoNNG/commit/c20aa27e5290bb480a5315099952480d35f37a8b"
        },
        {
          "name": "https://github.com/nanomq/nanomq/releases/tag/0.24.7",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/nanomq/nanomq/releases/tag/0.24.7"
        }
      ],
      "source": {
        "advisory": "GHSA-77f4-wvq8-mp3p",
        "discovery": "UNKNOWN"
      },
      "title": "NanoMQ HTTP Auth: Missing username/password can trigger a NULL-pointer strlen() in auth_http.c:set_data(), causing a process crash \u2014 SIGSEGV, remotely triggerable"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-32696",
    "datePublished": "2026-03-30T20:11:30.580Z",
    "dateReserved": "2026-03-13T14:33:42.822Z",
    "dateUpdated": "2026-03-31T15:24:06.506Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2026-32696\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"poc\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2026-03-31T15:23:56.365413Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2026-03-31T15:24:01.754Z\"}}], \"cna\": {\"title\": \"NanoMQ HTTP Auth: Missing username/password can trigger a NULL-pointer strlen() in auth_http.c:set_data(), causing a process crash \\u2014 SIGSEGV, remotely triggerable\", \"source\": {\"advisory\": \"GHSA-77f4-wvq8-mp3p\", \"discovery\": \"UNKNOWN\"}, \"metrics\": [{\"cvssV3_1\": {\"scope\": \"UNCHANGED\", \"version\": \"3.1\", \"baseScore\": 3.1, \"attackVector\": \"NETWORK\", \"baseSeverity\": \"LOW\", \"vectorString\": \"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:L\", \"integrityImpact\": \"NONE\", \"userInteraction\": \"REQUIRED\", \"attackComplexity\": \"HIGH\", \"availabilityImpact\": \"LOW\", \"privilegesRequired\": \"NONE\", \"confidentialityImpact\": \"NONE\"}}], \"affected\": [{\"vendor\": \"nanomq\", \"product\": \"nanomq\", \"versions\": [{\"status\": \"affected\", \"version\": \"\u003e= 0.24.6, \u003c 0.24.7\"}]}], \"references\": [{\"url\": \"https://github.com/nanomq/nanomq/security/advisories/GHSA-77f4-wvq8-mp3p\", \"name\": \"https://github.com/nanomq/nanomq/security/advisories/GHSA-77f4-wvq8-mp3p\", \"tags\": [\"x_refsource_CONFIRM\"]}, {\"url\": \"https://github.com/nanomq/NanoNNG/pull/1394\", \"name\": \"https://github.com/nanomq/NanoNNG/pull/1394\", \"tags\": [\"x_refsource_MISC\"]}, {\"url\": \"https://github.com/nanomq/NanoNNG/commit/c20aa27e5290bb480a5315099952480d35f37a8b\", \"name\": \"https://github.com/nanomq/NanoNNG/commit/c20aa27e5290bb480a5315099952480d35f37a8b\", \"tags\": [\"x_refsource_MISC\"]}, {\"url\": \"https://github.com/nanomq/nanomq/releases/tag/0.24.7\", \"name\": \"https://github.com/nanomq/nanomq/releases/tag/0.24.7\", \"tags\": [\"x_refsource_MISC\"]}], \"descriptions\": [{\"lang\": \"en\", \"value\": \"NanoMQ MQTT Broker (NanoMQ) is an all-around Edge Messaging Platform. In NanoMQ version 0.24.6, after enabling auth.http_auth (HTTP authentication), when a client connects to the broker using MQTT CONNECT without providing username/password, and the configuration params uses the placeholders %u / %P (e.g., username=\\\"%u\\\", password=\\\"%P\\\"), the HTTP request construction phase enters auth_http.c:set_data(). This results in calling strlen() on a NULL pointer, causing a SIGSEGV crash. This crash can be triggered remotely, resulting in a denial of service. This issue has been patched in version 0.24.7.\"}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-476\", \"description\": \"CWE-476: NULL Pointer Dereference\"}]}], \"providerMetadata\": {\"orgId\": \"a0819718-46f1-4df5-94e2-005712e83aaa\", \"shortName\": \"GitHub_M\", \"dateUpdated\": \"2026-03-30T20:11:30.580Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2026-32696\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-03-31T15:24:06.506Z\", \"dateReserved\": \"2026-03-13T14:33:42.822Z\", \"assignerOrgId\": \"a0819718-46f1-4df5-94e2-005712e83aaa\", \"datePublished\": \"2026-03-30T20:11:30.580Z\", \"assignerShortName\": \"GitHub_M\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}


Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
  • Confirmed: The vulnerability is confirmed from an analyst perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
  • Patched: This vulnerability was successfully patched by the user reporting the sighting.
  • Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
  • Not confirmed: The user expresses doubt about the veracity of the vulnerability.
  • Not patched: This vulnerability was not successfully patched by the user reporting the sighting.