What is CVE-2024-8376?

CVE-2024-8376 is a high-severity vulnerability in Eclipse Mosquitto, classified under Missing Release of Memory after Effective Lifetime. CVSS score: 7.5/10. Published 2024-10-11.

How severe is CVE-2024-8376?

High severity. CVSS v3 base score is 7.5 out of 10.

Is CVE-2024-8376 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Use After Free in Eclipse Mosquitto

CVE-2024-8376

In Eclipse Mosquitto up to version 2.0.18a, an attacker can achieve memory leaking, segmentation fault or heap-use-after-free by sending specific sequences of "CONNECT", "DISCONNECT", "SUBSCRIBE", "UNSUBSCRIBE" and "PUBLISH" packets.

Published 2024-10-11 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.007 (53.0th percentile), scored 2026-10-01.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 53rd percentile — 53.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.007 · newest: 0.007 · change: 0.000

Affected products

Eclipse Mosquitto
Eclipse Foundation Mosquitto — versions 2.0.18, 2.0.19

Weakness classification (CWE)

Public proof-of-concept exploits

fkie-cad/nvd-json-data-feeds

References

gitlab.eclipse.org/security/vulnerability-reports/-/issues/216 (issue-tracking, Issue Tracking)
gitlab.eclipse.org/security/vulnerability-reports/-/issues/217 (issue-tracking, Issue Tracking)
gitlab.eclipse.org/security/vulnerability-reports/-/issues/218 (issue-tracking, Issue Tracking)
gitlab.eclipse.org/security/vulnerability-reports/-/issues/227 (issue-tracking, Issue Tracking)
gitlab.eclipse.org/security/cve-assignement/-/issues/26 (vendor-advisory, Issue Tracking)
github.com/eclipse/mosquitto/releases/tag/v2.0.19 (Product, Patch, patch)
mosquitto.org/ (Product, product)
github.com/eclipse-mosquitto/mosquitto/commit/1914b3ee2a18102d0a94cbdbbfeae1afa… (Patch, patch)

Frequently asked questions

What is CVE-2024-8376?: CVE-2024-8376 is a high-severity vulnerability in Eclipse Mosquitto, classified under Missing Release of Memory after Effective Lifetime. CVSS score: 7.5/10. Published 2024-10-11.
How severe is CVE-2024-8376?: High severity. CVSS v3 base score is 7.5 out of 10.
Is CVE-2024-8376 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.