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CVE-2024-3935

21
FAUCET Score

CVE-2024-3935 describes a double free vulnerability in Eclipse Mosquitto versions 2.0.0 through 2.0.18. This flaw occurs when a broker is configured with an outgoing bridge connection using topic remapping, allowing a crafted PUBLISH packet from a remote connection to trigger a broker crash. Rated Medium severity (CVSS 6.5), it has a network attack vector, low attack complexity, and high impact on availability. There is currently no evidence of active exploitation, public exploit code, or significant community discussion surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
>= 2.0.0, < 2.0.19CPE matchmatch criteria
cpe:2.3:a:eclipse:mosquitto:*:*:*:*:*:*:*:*
>= 2.0.0, <= 2.0.18CPE match
cpe:2.3:a:eclipse:mosquitto:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 4.0

6.0MEDIUM

CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
PRESENT
Privileges Required
LOW
User Interaction
NONE
VS Confidentiality
NONE
VS Integrity
LOW
VS Availability
HIGH
SS Confidentiality
NONE
SS Integrity
NONE
SS Availability
NONE
Exploit Maturity
NOT_DEFINED
CvssVersion
4.0

Exploit Intelligence

EPSS Score
0.75%
Probability of exploitation in next 30 days
EPSS Percentile
51.4%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0075 is in the 62nd percentile among its peer group of 21,977 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (1)

github_advisorypatch availablevia nvd_reference
View patch

References

lists.debian.org / debian-lts-announce/2025/02/msg00022.html
github.com / eclipse-mosquitto/mosquitto/commit/ae7a804dadac8f2aaedb24336df8496a9680fda9
Patch
gitlab.eclipse.org / security/vulnerability-reports/-/issues/197
ExploitIssue TrackingVendor Advisory
mosquitto.org / blog/2024/10/version-2-0-19-released
Release Notes