CVE-2026-32135

NanoMQ has Heap Buffer Overflow in URI Parameter Parsing

HIGH
7.5
CVSS Score
Published: April 20, 2026 at 07:23 PM UTC
Updated: June 17, 2026 at 10:35 AM UTC
2 products affected across 2 vendorsNanomqNanomq

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Severity
HIGH7.5
Exploit prediction
EPSS 0.5%
SSVC
PoC

Description

NanoMQ MQTT Broker (NanoMQ) is an all-around Edge Messaging Platform. Versions prior to 0.24.11 have a remotely triggerable heap buffer overflow in the `uri_param_parse` function of NanoMQ's REST API. The vulnerability occurs due to an off-by-one error when allocating memory for query parameter keys and values, allowing an attacker to write a null byte beyond the allocated buffer. This can be triggered via a crafted HTTP request. Version 0.24.11 patches the issue.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

v < 0.24.11
v < 0.24.11
Affected range stops below 0.24.11, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

References (3)

x_refsource_CONFIRMExploitVendor Advisory
Source: cverecord
https://github.com/nanomq/nanomq/security/advisories/GHSA-6w96-9qw7-m599
x_refsource_MISCIssue Tracking
Source: cverecord
https://github.com/nanomq/nanomq/issues/2247

SSVC — Action Prioritization

SSVCPoCAutomatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusANALYZED
CWE
CWE-122

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