Unscored severity · published Oct 28, 2026
CVE-2026-106971
An integer overflow in the MessagePack\BufferUnpacker component of rybakit/msgpack v0.11.0 allows attackers to cause a Denial of Service (DoS) via a crafted input
New
–
CVSS
–
EPSS
No
On KEV
Description
An integer overflow in the MessagePack\BufferUnpacker component of rybakit/msgpack v0.11.0 allows attackers to cause a Denial of Service (DoS) via a crafted input.
Exploitation
Is it being used?
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-106971
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-106971
github.com
https://github.com/rybakit/msgpack.php
github.com
https://github.com/rybakit/msgpack.php/releases/tag/v0.11.0
github.com
https://github.com/diptendukar/security-advisories/blob/main/CVE-2026-106971.md