CVE-2026-44375

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...

Inefficient CPU Computation

Overview Nerdbank.MessagePack is an A modern, fast and NativeAOT-compatible MessagePack serialization library Affected versions of this package are vulnerable to Inefficient CPU Computation in the WithExpandoObjectConverter. An attacker can cause excessive CPU consumption by deserializing special...

Nerdbank.MessagePack has Inefficient CPU Computation

Impact Applications that call OptionalConverters.WithExpandoObjectConverter and deserialize untrusted data are open to a vulnerability by which an attacker can exploit a On² algorithm to burn an inordinate amount of CPU effort by adding a great many properties to an ExpandoObject, whose Add metho...

GHSA-92VJ-HP7M-GWCJ Nerdbank.MessagePack has Inefficient CPU Computation

Impact Applications that call OptionalConverters.WithExpandoObjectConverter and deserialize untrusted data are open to a vulnerability by which an attacker can exploit a On² algorithm to burn an inordinate amount of CPU effort by adding a great many properties to an ExpandoObject, whose Add metho...

Nerdbank.MessagePack has a memory amplification DoS in collection deserialization

Nerdbank.MessagePack deserializers for many collection-shaped types trusted the element count declared in MessagePack array and map headers when allocating destination storage. A crafted payload could therefore force large arrays, pooled buffers, dictionaries, or collection instances to be...

GHSA-QJVR-435C-5FJH Nerdbank.MessagePack has a memory amplification DoS in collection deserialization

Nerdbank.MessagePack deserializers for many collection-shaped types trusted the element count declared in MessagePack array and map headers when allocating destination storage. A crafted payload could therefore force large arrays, pooled buffers, dictionaries, or collection instances to be...

CVE-2026-44375

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...

CVE-2026-44375

The CVE-2026-44375 entry affects Nerdbank.MessagePack. The vulnerability arises in DateTime decoding where the reader can be fed a malicious MessagePack payload declaring an oversized timestamp extension length, enabling an attacker-controlled amount of stack memory to be allocated via stackalloc...

EUVD-2026-30299

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...

CVE-2026-44375 Nerdbank.MessagePack: Attacker-controlled stackalloc in DateTime decoding causes process-terminating StackOverflowException

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...

CVE-2026-44375

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...

CVE-2026-44375 Nerdbank.MessagePack: Attacker-controlled stackalloc in DateTime decoding causes process-terminating StackOverflowException

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...

Nerdbank.MessagePack 安全漏洞

Nerdbank.MessagePack is a .NET platform-specific MessagePack serialization library developed by Andrew Arnott. Versions of Nerdbank.MessagePack prior to 1.1.62 contained security vulnerabilities. These vulnerabilities stemmed from uncontrolled stack allocation during DateTime decoding. Malicious...

GHSA-2CWQ-PWFR-WCW3 Nerdbank.MessagePack: Attacker-controlled stackalloc in DateTime decoding causes process-terminating StackOverflowException

Summary 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...

PT-2026-38312

Summary 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...