CVE-2026-92707

MessagePack for C is a MessagePack serializer for C. Prior to 2.5.303 and 3.1.9, deserializing attacker-controlled MessagePack data as System.Object through PrimitiveObjectFormatter can cause excessive memory allocation. The formatter allocates an object from each declared array length before the...

EUVD-2026-102315

MessagePack for C is a MessagePack serializer for C. Prior to 2.5.303 and 3.1.9, deserializing attacker-controlled MessagePack data as System.Object through PrimitiveObjectFormatter can cause excessive memory allocation. The formatter allocates an object from each declared array length before the...

CVE-2026-92707 MessagePack: Nested arrays can blow past buffer length limits

MessagePack for C is a MessagePack serializer for C. Prior to 2.5.303 and 3.1.9, deserializing attacker-controlled MessagePack data as System.Object through PrimitiveObjectFormatter can cause excessive memory allocation. The formatter allocates an object from each declared array length before the...

CVE-2026-92707 MessagePack: Nested arrays can blow past buffer length limits

MessagePack for C is a MessagePack serializer for C. Prior to 2.5.303 and 3.1.9, deserializing attacker-controlled MessagePack data as System.Object through PrimitiveObjectFormatter can cause excessive memory allocation. The formatter allocates an object from each declared array length before the...

CVE-2026-92707

The MessagePack-CSharp library is vulnerable to an improperly controlled sequential memory allocation (CWE-1325) when deserializing attacker-controlled data as System.Object via the PrimitiveObjectFormatter . The root cause is that the formatter allocates an object[] based on declared array lengt...

CVE-2026-92707

MessagePack for C is a MessagePack serializer for C. Prior to 2.5.303 and 3.1.9, deserializing attacker-controlled MessagePack data as System.Object through PrimitiveObjectFormatter can cause excessive memory allocation. The formatter allocates an object from each declared array length before the...

MessagePack: Nested arrays can blow past buffer length limits

Impact MessagePack-CSharp is vulnerable to denial of service through excessive memory allocation when deserializing attacker-controlled data into System.Object. When PrimitiveObjectFormatter encounters an array, it allocates an object using the declared array length before enforcing the configure...

MessagePack-CSharp Denial of Service Vulnerability

Improperly controlled sequential memory allocation in .NET allows an unauthorized attacker to deny service over a network...

CVE-2026-92707

Impact MessagePack-CSharp is vulnerable to denial of service through excessive memory allocation when deserializing attacker-controlled data into "System.Object". When "PrimitiveObjectFormatter" encounters an array, it allocates an "object" using the declared array length before enforcing the...

PT-2026-113552

Microsoft has released Patch Tuesday for October 2026 Microsoft has published its October security update package Patch Tuesday, which includes fixes for 1,413 vulnerabilities, three of which are classified as 0-days one of them is actively exploited in attacks. Of the fixed vulnerabilities, 79 a...

AZL-106848 CVE-2026-107299 affecting package msgpack 3.3.0-1

msgpack5 is a msgpack v5 implementation for node.js and the browser. Prior to 6.1.0, the streaming decoder treats the reserved MessagePack byte 0xc1 as incomplete input instead of invalid input. When 0xc1 begins a stream, subsequent data remains buffered while the decoder waits for bytes that...

CVE-2026-107297

The msgpack5 library (a msgpack v5 implementation for Node.js and the browser) is vulnerable to a quadratic CPU use issue in versions prior to 6.1.0 . The streaming decoder reparses incomplete arrays or maps from the beginning every time a new chunk arrives. A remote peer can exploit this by spli...

CLEANSTART-2026-KG31017 MessagePack is the serializer implementation for Python msgpack

CVE-2026-57585 affects multiple packages. MessagePack is the serializer implementation for Python msgpack. See references for individual vulnerability details...

CLEANSTART-2026-ZD80119 MessagePack is the serializer implementation for Python msgpack

CVE-2026-57585 affects multiple packages. MessagePack is the serializer implementation for Python msgpack. See references for individual vulnerability details...

CVE-2026-57585

A flaw was found in MessagePack for Python, a serializer implementation. This vulnerability, categorized as a Use-After-Free CWE-416, occurs when the Unpacker component is reused after an error. A remote attacker could exploit this by repeatedly providing untrusted input, leading to an...

Security Bulletin: Vulnerability in MessagePack affects IBM watsonx Assistant Cartridge and IBM watsonx Orchestrate with watsonx Assistant Cartridge.

Summary Potential vulnerability in MessagePack has been identified that affects IBM watsonx Assistant Cartridge and IBM watsonx Orchestrate with watsonx Assistant Cartridge - Assistant Builder Component. . The vulnerability have been addressed. Refer to details for additional information...

MessagePack::Buffer#clear Use-After-Free that Enables Cross-Buffer Disclosure

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SUSE CVE-2026-54522

MessagePack for Ruby is an implementation of the MessagePack binary serialization format. Prior to 1.8.2, MessagePack::Bufferclear in ext/msgpack/buffer.c leaves rmemlast, rmemend, and rmemowner stale after msgpackbuffershiftchunk returns an rmem page to the shared pool, allowing a subsequent...

AZL-94449 CVE-2026-54522 affecting package rubygem-msgpack for versions less than 1.8.4-1

MessagePack for Ruby is an implementation of the MessagePack binary serialization format. Prior to 1.8.2, MessagePack::Bufferclear in ext/msgpack/buffer.c leaves rmemlast, rmemend, and rmemowner stale after msgpackbuffershiftchunk returns an rmem page to the shared pool, allowing a subsequent...

CVE-2026-54522

MessagePack for Ruby is an implementation of the MessagePack binary serialization format. Prior to 1.8.2, MessagePack::Bufferclear in ext/msgpack/buffer.c leaves rmemlast, rmemend, and rmemowner stale after msgpackbuffershiftchunk returns an rmem page to the shared pool, allowing a subsequent...