What’s Vulnerable › Vulnerabilities

CVE-2024-35512

• Severity: medium (CVSS 5.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2024-05-29 · updated 2026-06-17

Description

hmq v1.5.5 is vulnerable to Denial of Service (DoS) due to a Null Pointer Exception. A remote attacker can trigger a broker crash by sending a specially crafted MQTT UNSUBSCRIBE packet with an illegal control character Topic. The failure to properly validate this field leads to a null pointer dereference, resulting in the immediate termination of the hmq process.

Affected products

• Fhmq Hmq: 1.5.5

References

• https://gist.github.com/pengwGit/6ccca73a5acf91f31ff0d4185b15a3ea
• https://gist.github.com/pengwGit/6ccca73a5acf91f31ff0d4185b15a3ea

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