Uncontrolled Recursion in msgpack5 - #VU152779
Published: September 29, 2026
Vulnerability identifier: #VU152779
CSH Severity: Medium
CVSS v4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]
CVE-ID: N/A
CWE-ID: CWE-674
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to uncontrolled recursion in the msgpack5 decoder when decoding deeply nested MessagePack arrays or maps. A remote attacker can provide deeply nested MessagePack input to cause a denial of service.
Affected software
msgpack5
Remediation
Install security update from vendor's website.
msgpack5 - update to 6.1.0