CVE-2025-59947

Description

NanoMQ is a messaging broker/bus for IoT Edge & SDV. Versions prior to 0.24.4 have a buffer overflow case while the PUBLISH packets trigger both shared subscription and vanila subscription. This is fixed in version 0.24.4. As a workaround, disable shared subscription.

CVSS v3.1 Score

9.0

CRITICAL

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H

Weakness Type (CWE)

CWE-120 CWE-120

Affected Products

Vendor	Product	Versions
emqx	nanomq	< 0.24.4

References

Advisories & Patches

https://github.com/nanomq/nanomq/commit/5f5581054bb92f102cf99251e8af2f43763d457b https://github.com/nanomq/nanomq/issues/2110 https://github.com/nanomq/nanomq/security/advisories/GHSA-98f4-cmg8-x7f3

Frequently Asked Questions

What is CVE-2025-59947? +

NanoMQ is a messaging broker/bus for IoT Edge & SDV. Versions prior to 0.24.4 have a buffer overflow case while the PUBLISH packets trigger both shared subscription and vanila subscription. This is fixed in version 0.24.4. As a workaround, disable shared subscription. It has a CVSS v3.1 base score of 9.0 (CRITICAL).

How severe is CVE-2025-59947? +

CVE-2025-59947 has a CVSS v3.1 score of 9.0 out of 10, rated CRITICAL. This is a critical vulnerability that should be patched immediately.

What products are affected by CVE-2025-59947? +

CVE-2025-59947 affects products from emqx, specifically: nanomq. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2025-59947? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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