PT-2026-29862 · Emqx+1 · Nanomq
Grant-Yim
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Publicado
2026-04-02
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Atualizado
2026-04-02
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CVE-2026-34608
CVSS v3.1
4.9
Média
| Vetor | AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H |
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.
Correção
Out of bounds Read
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