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CVE-2026-32135

Emqx Nanomq buffer overflow

7.5 HIGHPublic exploitEPSS 0.94%
  1. Published20 Apr 2026

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.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
ScopeUnchanged
ConfidentialityNone
IntegrityNone
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected products

Emqx Nanomq< 0.24.11

Remediation

Fixed in
Emqx Nanomq≥ 0.24.11

References

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Frequently asked

Is CVE-2026-32135 being actively exploited?

CVE-2026-32135 is not in the CISA KEV catalog. A public exploit reference exists, so treat it as exploitable. Its EPSS exploit probability is 0.94%.

How severe is CVE-2026-32135?

CVE-2026-32135 has a CVSS 3.1 base score of 7.5, rated high. EPSS estimates a 0.94% probability of exploitation.

Which products are affected by CVE-2026-32135?

Affected products include Emqx Nanomq.

How do I fix CVE-2026-32135?

Upgrade affected software to a fixed version, for example Emqx Nanomq 0.24.11 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2026-32135 against the real software inventory on every managed device, every day. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.