How severe is CVE-2024-3935?

CVE-2024-3935 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2024-3935 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (51st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2024-3935?

CVE-2024-3935 affects Eclipse Mosquitto. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2024-3935?

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

Does CVE-2024-3935 have an EU (EUVD) identifier?

Yes. CVE-2024-3935 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-32502.

When was CVE-2024-3935 published?

CVE-2024-3935 was published on 2024-10-30 and last updated on 2026-06-17.

CVE-2024-3935

CVE-2024-3935 is a medium-severity vulnerability in Eclipse Mosquitto with a CVSS 3.x base score of 6.5. 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-415.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
CVSS v4: 6.0
EPSS exploit prediction: 1% (51st percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2024-32502
Weakness: CWE-415
Affected product: Eclipse Mosquitto
Published: 2024-10-30
Last modified: 2026-06-17

Description

In Eclipse Mosquito, versions from 2.0.0 through 2.0.18, if a Mosquitto broker is configured to create an outgoing bridge connection, and that bridge connection has an incoming topic configured that makes use of topic remapping, then if the remote connection sends a crafted PUBLISH packet to the broker a double free will occur with a subsequent crash of the broker.

Frequently asked questions

What is CVE-2024-3935?: In Eclipse Mosquito, versions from 2.0.0 through 2.0.18, if a Mosquitto broker is configured to create an outgoing bridge connection, and that bridge connection has an incoming topic configured that makes use of topic remapping, then if the remote connection sends a crafted PUBLISH packet to the broker a double free will occur with a subsequent crash of the broker.
How severe is CVE-2024-3935?: CVE-2024-3935 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2024-3935 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (51st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2024-3935?: CVE-2024-3935 affects Eclipse Mosquitto. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2024-3935?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2024-3935 have an EU (EUVD) identifier?: Yes. CVE-2024-3935 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-32502.
When was CVE-2024-3935 published?: CVE-2024-3935 was published on 2024-10-30 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:eclipse:mosquitto:*:*:*:*:*:*:*:*

More vulnerabilities in Eclipse Mosquitto

CVE-2024-10525 — Critical (CVSS 9.8): In Eclipse Mosquitto, from version 1.3.2 through 2.0.18, if a malicious broker sends a crafted SUBACK packet with no…
CVE-2018-12551 — High (CVSS 8.1): When Eclipse Mosquitto version 1.0 to 1.5.5 (inclusive) is configured to use a password file for authentication, any…
CVE-2018-12550 — High (CVSS 8.1): When Eclipse Mosquitto version 1.0 to 1.5.5 (inclusive) is configured to use an ACL file, and that ACL file is empty,…
CVE-2024-8376 — High (CVSS 7.5): In Eclipse Mosquitto up to version 2.0.18a, an attacker can achieve memory leaking, segmentation fault or…
CVE-2023-5632 — High (CVSS 7.5): In Eclipse Mosquito before and including 2.0.5, establishing a connection to the mosquitto server without sending data…
CVE-2023-28366 — High (CVSS 7.5): The broker in Eclipse Mosquitto 1.3.2 through 2.x before 2.0.16 has a memory leak that can be abused remotely when a…

All CVEs affecting Eclipse Mosquitto →

Other CWE-415 (Double Free) vulnerabilities

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CVE-2026-8925 — Critical (CVSS 9.8): The curl logic that works with SASL authentication could end up cleaning up the GSASL context *twice* without clearing…
CVE-2020-37239 — Critical (CVSS 9.8): libbabl 0.1.62 contains a broken double free detection vulnerability that allows attackers to bypass memory safety…
CVE-2026-43011 — Critical (CVSS 9.8): In the Linux kernel, the following vulnerability has been resolved: net/x25: Fix potential double free of skb When…
CVE-2026-31609 — Critical (CVSS 9.8): In the Linux kernel, the following vulnerability has been resolved: smb: client: avoid double-free in…
CVE-2026-31608 — Critical (CVSS 9.8): In the Linux kernel, the following vulnerability has been resolved: smb: server: avoid double-free in…

Browse all CWE-415 (Double Free) vulnerabilities →

Threat intelligence

Threat-intel indicators referencing this CVE:

109.50.185.153 (ipv4-addr)
98.122.215.23 (ipv4-addr)