rybakit msgpack 0.11.0 unpack recursion

Summaryinfo

A vulnerability described as problematic has been identified in rybakit msgpack 0.11.0. The impacted element is the function MessagePack\BufferUnpacker::unpack. Such manipulation leads to recursion. This vulnerability is documented as CVE-2026-106972. The attack can be executed remotely. There is not any exploit available.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in rybakit msgpack 0.11.0. Affected by this issue is the function MessagePack\BufferUnpacker::unpack. The manipulation with an unknown input leads to a recursion vulnerability. Using CWE to declare the problem leads to CWE-674. The product does not properly control the amount of recursion that takes place, consuming excessive resources, such as allocated memory or the program stack. Impacted is availability. CVE summarizes:

An uncontrolled recursion in the MessagePack\BufferUnpacker::unpack() component of rybakit/msgpack v0.11.0 allows attackers to cause a Denial of Service (DoS) via a crafted input.

The advisory is available at github.com. This vulnerability is handled as CVE-2026-106972 since 10/07/2026. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. Technical details are known, but there is no available exploit. This vulnerability is assigned to T1499 by the MITRE ATT&CK project.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

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Productinfo

Vendor

• rybakit

Name

• msgpack

Version

• 0.11.0

CPE 2.3info

• 🔒

CPE 2.2info

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