CVE Catalog

CVE-2026-44375

High
Published: Translated: NVD NIST

Summary

Nerdbank.MessagePack is a MessagePack serialization library that prior to version 1.1.62 contained an uncontrolled stack allocation vulnerability in DateTime decoding. A malicious MessagePack payload could declare an oversized timestamp extension length, leading to an attacker-controlled number of bytes being allocated on the stack.

Risk Assessment

This vulnerability could trigger a StackOverflowException, which is not catchable by user code, resulting in process termination. This may lead to application downtime and potential financial losses.

Recommendation

It is recommended to update the Nerdbank.MessagePack library to version 1.1.62 or later to mitigate this vulnerability. Regular monitoring and updating of software components is crucial for maintaining security.

Related vulnerabilities

Original NVD description (English source)

Nerdbank.MessagePack is a NativeAOT-compatible MessagePack serialization library. Prior to 1.1.62, Nerdbank.MessagePack contains an uncontrolled stack allocation vulnerability in DateTime decoding. A malicious MessagePack payload can declare an oversized timestamp extension length, causing the reader to allocate an attacker-controlled number of bytes on the stack. This can trigger a StackOverflowException, which is not catchable by user code and terminates the process. This vulnerability is fixed in 1.1.62.

Vulnerability data from NVD (NIST) · CISA KEV · EPSS