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CVE-2026-21888
Published: Mar 11, 2026
Modified: Mar 11, 2026
PUBLISHED
CVSS v3.1
7.5
HIGH
Description
NanoMQ MQTT Broker (NanoMQ) is an all-around Edge Messaging Platform. MQTT v5 Variable Byte Integer parsing out-of-bounds: get_var_integer() accepts 5-byte varints without bounds checks; reliably triggers OOB read / crash when built with ASan. This affects 0.24.6 and earlier.
| Vendor | Product | Versions |
|---|---|---|
nanomq | nanomq | affected <= 0.24.6 |
Weaknesses (CWE)
CVSS v3.1 Details
CVSS v3.1 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High
References
https://github.com/nanomq/nanomq/security/advisories/GHSA-cggc-6m7w-j7x5
x_refsource_CONFIRM
https://github.com/nanomq/nanomq/issues/2192
x_refsource_MISC
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