CVE-2026-34608 (GCVE-0-2026-34608)
Vulnerability from cvelistv5
Published
2026-04-02 17:52
Modified
2026-04-02 19:10
Severity ?
VLAI Severity ?
EPSS score ?
Summary
NanoMQ MQTT Broker (NanoMQ) is an all-around Edge Messaging Platform. Prior to version 0.24.10, in NanoMQ's webhook_inproc.c, the hook_work_cb() function processes nng messages by parsing the message body with cJSON_Parse(body). The body is obtained from nng_msg_body(msg), which is a binary buffer without a guaranteed null terminator. This leads to an out-of-bounds read (OOB read) as cJSON_Parse reads until it finds a \0, potentially accessing memory beyond the allocated buffer (e.g., nng_msg metadata or adjacent heap/stack). The issue is often masked by nng's allocation padding (extra 32 bytes of zeros for non-power-of-two sizes <1024 or non-aligned). The overflow is reliably triggered when the JSON payload length is a power-of-two >=1024 (no padding added). This issue has been patched in version 0.24.10.
References
| URL | Tags | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
|
|||||||||||
{
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2026-34608",
"options": [
{
"Exploitation": "poc"
},
{
"Automatable": "no"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-04-02T19:10:50.684727Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-04-02T19:10:58.813Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"product": "nanomq",
"vendor": "nanomq",
"versions": [
{
"status": "affected",
"version": "\u003c 0.24.10"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "NanoMQ MQTT Broker (NanoMQ) is an all-around Edge Messaging Platform. Prior to version 0.24.10, in NanoMQ\u0027s webhook_inproc.c, the hook_work_cb() function processes nng messages by parsing the message body with cJSON_Parse(body). The body is obtained from nng_msg_body(msg), which is a binary buffer without a guaranteed null terminator. This leads to an out-of-bounds read (OOB read) as cJSON_Parse reads until it finds a \\0, potentially accessing memory beyond the allocated buffer (e.g., nng_msg metadata or adjacent heap/stack). The issue is often masked by nng\u0027s allocation padding (extra 32 bytes of zeros for non-power-of-two sizes \u003c1024 or non-aligned). The overflow is reliably triggered when the JSON payload length is a power-of-two \u003e=1024 (no padding added). This issue has been patched in version 0.24.10."
}
],
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 4.9,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "HIGH",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H",
"version": "3.1"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-125",
"description": "CWE-125: Out-of-bounds Read",
"lang": "en",
"type": "CWE"
}
]
},
{
"descriptions": [
{
"cweId": "CWE-457",
"description": "CWE-457: Use of Uninitialized Variable",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-04-02T17:52:51.813Z",
"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"shortName": "GitHub_M"
},
"references": [
{
"name": "https://github.com/nanomq/nanomq/security/advisories/GHSA-8p57-jxj9-3qq3",
"tags": [
"x_refsource_CONFIRM"
],
"url": "https://github.com/nanomq/nanomq/security/advisories/GHSA-8p57-jxj9-3qq3"
},
{
"name": "https://github.com/nanomq/nanomq/commit/9499a4b2c47998a6aadb69238c18b9e6771b1691",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/nanomq/nanomq/commit/9499a4b2c47998a6aadb69238c18b9e6771b1691"
},
{
"name": "https://github.com/nanomq/nanomq/releases/tag/0.24.10",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/nanomq/nanomq/releases/tag/0.24.10"
}
],
"source": {
"advisory": "GHSA-8p57-jxj9-3qq3",
"discovery": "UNKNOWN"
},
"title": "nanomq: Heap-Buffer-Overflow in webhook_inproc.c via cJSON_Parse OOB Read"
}
},
"cveMetadata": {
"assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"assignerShortName": "GitHub_M",
"cveId": "CVE-2026-34608",
"datePublished": "2026-04-02T17:52:51.813Z",
"dateReserved": "2026-03-30T17:15:52.500Z",
"dateUpdated": "2026-04-02T19:10:58.813Z",
"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-2026-34608\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"poc\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2026-04-02T19:10:50.684727Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2026-04-02T19:10:55.411Z\"}}], \"cna\": {\"title\": \"nanomq: Heap-Buffer-Overflow in webhook_inproc.c via cJSON_Parse OOB Read\", \"source\": {\"advisory\": \"GHSA-8p57-jxj9-3qq3\", \"discovery\": \"UNKNOWN\"}, \"metrics\": [{\"cvssV3_1\": {\"scope\": \"UNCHANGED\", \"version\": \"3.1\", \"baseScore\": 4.9, \"attackVector\": \"NETWORK\", \"baseSeverity\": \"MEDIUM\", \"vectorString\": \"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H\", \"integrityImpact\": \"NONE\", \"userInteraction\": \"NONE\", \"attackComplexity\": \"LOW\", \"availabilityImpact\": \"HIGH\", \"privilegesRequired\": \"HIGH\", \"confidentialityImpact\": \"NONE\"}}], \"affected\": [{\"vendor\": \"nanomq\", \"product\": \"nanomq\", \"versions\": [{\"status\": \"affected\", \"version\": \"\u003c 0.24.10\"}]}], \"references\": [{\"url\": \"https://github.com/nanomq/nanomq/security/advisories/GHSA-8p57-jxj9-3qq3\", \"name\": \"https://github.com/nanomq/nanomq/security/advisories/GHSA-8p57-jxj9-3qq3\", \"tags\": [\"x_refsource_CONFIRM\"]}, {\"url\": \"https://github.com/nanomq/nanomq/commit/9499a4b2c47998a6aadb69238c18b9e6771b1691\", \"name\": \"https://github.com/nanomq/nanomq/commit/9499a4b2c47998a6aadb69238c18b9e6771b1691\", \"tags\": [\"x_refsource_MISC\"]}, {\"url\": \"https://github.com/nanomq/nanomq/releases/tag/0.24.10\", \"name\": \"https://github.com/nanomq/nanomq/releases/tag/0.24.10\", \"tags\": [\"x_refsource_MISC\"]}], \"descriptions\": [{\"lang\": \"en\", \"value\": \"NanoMQ MQTT Broker (NanoMQ) is an all-around Edge Messaging Platform. Prior to version 0.24.10, in NanoMQ\u0027s webhook_inproc.c, the hook_work_cb() function processes nng messages by parsing the message body with cJSON_Parse(body). The body is obtained from nng_msg_body(msg), which is a binary buffer without a guaranteed null terminator. This leads to an out-of-bounds read (OOB read) as cJSON_Parse reads until it finds a \\\\0, potentially accessing memory beyond the allocated buffer (e.g., nng_msg metadata or adjacent heap/stack). The issue is often masked by nng\u0027s allocation padding (extra 32 bytes of zeros for non-power-of-two sizes \u003c1024 or non-aligned). The overflow is reliably triggered when the JSON payload length is a power-of-two \u003e=1024 (no padding added). This issue has been patched in version 0.24.10.\"}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-125\", \"description\": \"CWE-125: Out-of-bounds Read\"}]}, {\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-457\", \"description\": \"CWE-457: Use of Uninitialized Variable\"}]}], \"providerMetadata\": {\"orgId\": \"a0819718-46f1-4df5-94e2-005712e83aaa\", \"shortName\": \"GitHub_M\", \"dateUpdated\": \"2026-04-02T17:52:51.813Z\"}}}",
"cveMetadata": "{\"cveId\": \"CVE-2026-34608\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-04-02T19:10:58.813Z\", \"dateReserved\": \"2026-03-30T17:15:52.500Z\", \"assignerOrgId\": \"a0819718-46f1-4df5-94e2-005712e83aaa\", \"datePublished\": \"2026-04-02T17:52:51.813Z\", \"assignerShortName\": \"GitHub_M\"}",
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
}
}
Loading…
Loading…
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.
Loading…
Loading…