CVE-2026-21888

HIGH EPSS 21.9%
Published Mar 11, 20263mo ago · Modified Mar 17, 20263mo ago
7.5 CVSS 3.1
High
Find Similar
Published Mar 11, 2026 3mo ago
Last Modified Mar 17, 2026 3mo ago

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.

CVSS Details

Base Score
7.5
Exploitability
3.9
Impact
3.6
Vector string
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

Threat Intelligence

EPSS Exploit Probability
21.9% percentile
Exploit & Patch Status
Public Exploit Known
No Patch Available

Weaknesses 1

CWE-125 Out-of-bounds Read Memory Safety

Affected Products 1

VendorProductVersionRange
emqxnanomq* ≤0.24.6

References 2

  • github.com https://github.com/nanomq/nanomq/issues/2192
    Issue Tracking
  • github.com https://github.com/nanomq/nanomq/security/advisories/GHSA-cggc-6m7w-j7x5
    ExploitVendor Advisory

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.