CVE-2026-57585 MessagePack: Out-of-bounds read/crash on Unpacker reuse after caught error

MessagePack is the serializer implementation for Python msgpack.org. Prior to 1.2.1, there is an Out-of-bounds read/crash on Unpacker reuse after a caught error, potentially leading to a DoS attack. If the Unpacker is used repeatedly after an error occurs, the process may crash with a SEGV. This...

ROOT-APP-PYPI-GHSA-6V7P-G79W-8964 GHSA-6v7p-g79w-8964 in rootio-msgpack - Patched by Root

Root has patched GHSA-6v7p-g79w-8964 in the rootio-msgpack package for Root:PyPI. Multiple fixed versions available...

GHSA-Q2H6-GHWM-5QM8 MessagePack-CSharp: InterfaceLookupFormatter bypasses collision-resistant comparer settings

Summary InterfaceLookupFormatter constructs an internal Dictionary with the default equality comparer instead of the security-aware comparer supplied by options.Security.GetEqualityComparer. Other hash-based collection formatters use the security-aware comparer when...

EUVD-2026-38382

MessagePack-CSharp: Unity unsafe blit formatter allocates from unbounded byte length...

EUVD-2026-38384

MessagePack-CSharp: JSON conversion APIs can recurse without consistent depth enforcement...

EUVD-2026-38386

MessagePack-CSharp: LZ4 decompression allocates from unbounded declared output lengths...

EUVD-2026-38387

MessagePack-CSharp: ASP.NET Core MessagePackInputFormatter defaults to TrustedData for HTTP request bodies...

dotnet: ASP.NET Core: Denial of Service via uncontrolled resource consumption

A flaw was found in ASP.NET Core SignalR and Blazor Server. A remote attacker could send a specially crafted MessagePack payload containing deeply nested arrays that trigger excessive recursion and cause a stack overflow. This issue may result in application termination and a denial of service...

CVE-2026-42600

Summary of the vulnerability (CVE-2026-42600) : MinIO’s ReadMultiple internode storage-REST endpoint is vulnerable to path traversal when processing a msgpack-encoded ReadMultipleReq body. An attacker holding the cluster root JWT can craft a request to POST /minio/storage/{drivePath}/v63/rmpl wit...

GHSA-H9Q6-HC68-35RP Denial of service in github.com/shamaton/msgpack

The msgpack decoder fails to properly validate the input buffer length when processing truncated fixext data format codes 0xd4-0xd8. This can lead to an out-of-bounds read and a runtime panic, allowing a denial of service attack...

CVE-2026-2454

Mattermost vulnerability CVE-2026-2454 affects Mattermost server versions 11.3.x (≤11.3.0), 11.2.x (≤11.2.2), and 10.11.x (≤10.11.10). The issue arises from incorrect handling of array lengths in error reports, enabling a malicious user to trigger OOMs and crash the server by sending corrupted ms...

Deserialization of Untrusted Data

Overview langgraph-checkpoint is a library with base interfaces for LangGraph checkpoint savers. Affected versions of this package are vulnerable to Deserialization of Untrusted Data in the msgpack-encoded checkpoints. An attacker can execute arbitrary code by supplying a crafted msgpack-encoded...

Deserialization of Untrusted Data

Overview langgraph is a Building stateful, multi-actor applications with LLMs Affected versions of this package are vulnerable to Deserialization of Untrusted Data in the msgpack-encoded checkpoints. An attacker can execute arbitrary code by supplying a crafted msgpack-encoded payload to the...

EUVD-2026-9860

LangGraph checkpoint loading has unsafe msgpack deserialization...

msgpacker security vulnerability

msgpacker is a fast MessagePack NodeJS/JavaScript implementation. A security vulnerability exists in versions of msgpacker prior to 1.10.1, which stems from the fact that when decoding a user-supplied MessagePack message, an attacker can craft the message in such a way that the decoder triggers...

CVE-2021-46878

An issue was discovered in Treasure Data Fluent Bit 1.7.1, erroneous parsing in flbpackmsgpacktojsonformat leads to type confusion bug that interprets whatever is on the stack as msgpack maps and arrays, leading to use-after-free. This can be used by an attacker to craft a specially craft file an...