How severe is CVE-2026-45151?

CVE-2026-45151 has a CVSS 4.0 base score of 2.9, rated low severity.

Is CVE-2026-45151 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (13th percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2026-45151?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-45151 have an EU (EUVD) identifier?

Yes. CVE-2026-45151 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-33429.

When was CVE-2026-45151 published?

CVE-2026-45151 was published on 2026-05-29 and last updated on 2026-06-17.

CVE-2026-45151

CVE-2026-45151 is a low-severity vulnerability with a CVSS 4.0 base score of 2.9. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-476.

Key facts

Severity: Low (CVSS 4.0 base score 2.9)
EPSS exploit prediction: 0% (13th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-33429
Weakness: CWE-476
Published: 2026-05-29
Last modified: 2026-06-17

Description

NanoMQ MQTT Broker (NanoMQ) is an all-around Edge Messaging Platform. In 0.24.8 and earlier, quic_stream_recv can dereference a null substream pointer when a substream is in reopen state. The code finishes the AIO with error but does not return before locking c->mtx.

Frequently asked questions

What is CVE-2026-45151?: NanoMQ MQTT Broker (NanoMQ) is an all-around Edge Messaging Platform. In 0.24.8 and earlier, quic_stream_recv can dereference a null substream pointer when a substream is in reopen state. The code finishes the AIO with error but does not return before locking c->mtx.
How severe is CVE-2026-45151?: CVE-2026-45151 has a CVSS 4.0 base score of 2.9, rated low severity.
Is CVE-2026-45151 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (13th percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2026-45151?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-45151 have an EU (EUVD) identifier?: Yes. CVE-2026-45151 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-33429.
When was CVE-2026-45151 published?: CVE-2026-45151 was published on 2026-05-29 and last updated on 2026-06-17.

References

https://github.com/nanomq/nanomq/security/advisories/GHSA-9qhf-wgp4-p7w5

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