CVE-2023-5632

7.5 highEPSS 0.8%

High (7.5) in eclipse mosquitto. EPSS 0.8% chance of exploitation in the next 30 days.

In Eclipse Mosquito before and including 2.0.5, establishing a connection to the mosquitto server without sending data causes the EPOLLOUT event to be added, which results excessive CPU consumption. This could be used by a malicious actor to perform denial of service type attack. This issue is fixed in 2.0.6

Severity

CVSS 3.1

7.5 high

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

EPSS: 0.8% chance of exploitation in the next 30 days; higher than 56% of CVEs (scores of 2026-11-01)
CWE: CWE-834
Published: 2023-10-18
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

eclipse:mosquitto

References

https://github.com/eclipse/mosquitto/commit/18bad1ff32435e523d7507e9b2ce0010124a8f2d
https://github.com/eclipse/mosquitto/pull/2053
https://github.com/eclipse/mosquitto/commit/18bad1ff32435e523d7507e9b2ce0010124a8f2d
https://github.com/eclipse/mosquitto/pull/2053

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