# MessagePack (NuGet) vulnerabilities Source: https://junglewise.ai/threats/technologies/messagepack Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats Updated: 9 November 2026, 03:07 UTC. Rebuilt every hour. Data: https://junglewise.ai/threats/technologies/messagepack.json License: CC BY 4.0 with a link back Junglewise Threat Intelligence has tracked 15 vulnerabilities in MessagePack (NuGet): 0 in the last 7 days and 1 in the last 90 days, 0 of them critical and 0 exploited in the wild. The most recent, CVE-2026-92707, was published on 15 October 2026. 1 vulnerability in the last four weeks, up from none in the four before. ## Counts - Last 7 days: 0 - Last 30 days: 1 - Last 90 days: 1 - All time: 15 (0 critical, 0 exploited in the wild) ## About MessagePack (NuGet) An efficient binary serialization format that lets you exchange data among multiple languages like JSON. ## Latest MessagePack (NuGet) vulnerabilities - [CVE-2026-92707: MessagePack-CSharp memory exhaustion in nested array deserialization](https://junglewise.ai/threats/cve-2026-92707-messagepack-nested-arrays-can-blow-past-buffer-length-limits) (medium, CVSS 5.3, published 15 Oct 2026) - [CVE-2026-48517: MessagePack for C# security bypass in typeless deserialization](https://junglewise.ai/threats/cve-2026-48517-messagepack-for-c-security-bypass-in-typeless-deserialization) (medium, CVSS 4, published 22 Jun 2026) - [CVE-2026-48516: MessagePack for C# hash-collision DoS in InterfaceLookupFormatter](https://junglewise.ai/threats/cve-2026-48516-messagepack-for-c-hash-collision-dos-in-interfacelookupformatter) (medium, CVSS 4, published 22 Jun 2026) - [CVE-2026-48515: MessagePack for C# resource exhaustion in multi-dimensional array formatters](https://junglewise.ai/threats/cve-2026-48515-messagepack-for-c-resource-exhaustion-in-multi-dimensional-array) (medium, CVSS 4, published 22 Jun 2026) - [CVE-2026-48514: MessagePack for C# denial of service in UnsafeBlitFormatterBase](https://junglewise.ai/threats/cve-2026-48514-messagepack-for-c-denial-of-service-in-unsafeblitformatterbase) (medium, CVSS 4, published 22 Jun 2026) - [CVE-2026-48513: MessagePack for C# uncontrolled recursion in DynamicUnionResolver](https://junglewise.ai/threats/cve-2026-48513-messagepack-for-c-uncontrolled-recursion-in-dynamicunionresolver) (medium, CVSS 4, published 22 Jun 2026) - [CVE-2026-48512: MessagePack for C# uncontrolled recursion in JSON conversion helpers](https://junglewise.ai/threats/cve-2026-48512-messagepack-for-c-uncontrolled-recursion-in-json-conversion) (medium, CVSS 4, published 22 Jun 2026) - [CVE-2026-48511: MessagePack for C# denial of service in ExpandoObjectFormatter](https://junglewise.ai/threats/cve-2026-48511-messagepack-for-c-denial-of-service-in-expandoobjectformatter) (high, CVSS 7.5, published 22 Jun 2026) - [CVE-2026-48510: MessagePack for C# denial of service via LZ4 decompression bomb](https://junglewise.ai/threats/cve-2026-48510-messagepack-for-c-denial-of-service-via-lz4-decompression-bomb) (high, CVSS 7.5, published 22 Jun 2026) - [CVE-2026-48509: MessagePack for C# insecure default in MessagePackInputFormatter](https://junglewise.ai/threats/cve-2026-48509-messagepack-for-c-insecure-default-in-messagepackinputformatter) (medium, CVSS 4, published 22 Jun 2026) - [CVE-2026-48506: MessagePack for C# uncontrolled recursion in MessagePackReader.TrySkip](https://junglewise.ai/threats/cve-2026-48506-messagepack-for-c-uncontrolled-recursion-in-messagepackreader) (high, CVSS 7.5, published 22 Jun 2026) - [CVE-2026-48502: MessagePack for C# stack overflow in MessagePackReader.ReadDateTime](https://junglewise.ai/threats/cve-2026-48502-messagepack-for-c-stack-overflow-in-messagepackreader) (high, CVSS 4, published 22 Jun 2026) - [CVE-2026-48109: MessagePack for C# out-of-bounds read in LZ4 decompression](https://junglewise.ai/threats/cve-2026-48109-messagepack-for-c-out-of-bounds-read-in-lz4-decompression) (high, CVSS 8.2, published 22 Jun 2026) - [CVE-2024-48924: MessagePack allows untrusted data to lead to DoS attack due to hash collisions and stack overflow](https://junglewise.ai/threats/cve-2024-48924-messagepack-allows-untrusted-data-to-lead-to-dos-attack-due-to) (info, published 17 Oct 2024) - [CVE-2020-5234: Untrusted data can lead to DoS attack due to hash collisions and stack overflow in MessagePack](https://junglewise.ai/threats/cve-2020-5234-untrusted-data-can-lead-to-dos-attack-due-to-hash-collisions-and) (low, CVSS 3.1, published 31 Jan 2020) ## Most severe MessagePack (NuGet) vulnerabilities - [CVE-2026-48109: MessagePack for C# out-of-bounds read in LZ4 decompression](https://junglewise.ai/threats/cve-2026-48109-messagepack-for-c-out-of-bounds-read-in-lz4-decompression) (high, CVSS 8.2, published 22 Jun 2026) - [CVE-2026-48506: MessagePack for C# uncontrolled recursion in MessagePackReader.TrySkip](https://junglewise.ai/threats/cve-2026-48506-messagepack-for-c-uncontrolled-recursion-in-messagepackreader) (high, CVSS 7.5, published 22 Jun 2026) - [CVE-2026-48511: MessagePack for C# denial of service in ExpandoObjectFormatter](https://junglewise.ai/threats/cve-2026-48511-messagepack-for-c-denial-of-service-in-expandoobjectformatter) (high, CVSS 7.5, published 22 Jun 2026) - [CVE-2026-48510: MessagePack for C# denial of service via LZ4 decompression bomb](https://junglewise.ai/threats/cve-2026-48510-messagepack-for-c-denial-of-service-via-lz4-decompression-bomb) (high, CVSS 7.5, published 22 Jun 2026) - [CVE-2026-48502: MessagePack for C# stack overflow in MessagePackReader.ReadDateTime](https://junglewise.ai/threats/cve-2026-48502-messagepack-for-c-stack-overflow-in-messagepackreader) (high, CVSS 4, published 22 Jun 2026) - [CVE-2026-92707: MessagePack-CSharp memory exhaustion in nested array deserialization](https://junglewise.ai/threats/cve-2026-92707-messagepack-nested-arrays-can-blow-past-buffer-length-limits) (medium, CVSS 5.3, published 15 Oct 2026) - [CVE-2026-48509: MessagePack for C# insecure default in MessagePackInputFormatter](https://junglewise.ai/threats/cve-2026-48509-messagepack-for-c-insecure-default-in-messagepackinputformatter) (medium, CVSS 4, published 22 Jun 2026) - [CVE-2026-48516: MessagePack for C# hash-collision DoS in InterfaceLookupFormatter](https://junglewise.ai/threats/cve-2026-48516-messagepack-for-c-hash-collision-dos-in-interfacelookupformatter) (medium, CVSS 4, published 22 Jun 2026) - [CVE-2026-48515: MessagePack for C# resource exhaustion in multi-dimensional array formatters](https://junglewise.ai/threats/cve-2026-48515-messagepack-for-c-resource-exhaustion-in-multi-dimensional-array) (medium, CVSS 4, published 22 Jun 2026) - [CVE-2026-48514: MessagePack for C# denial of service in UnsafeBlitFormatterBase](https://junglewise.ai/threats/cve-2026-48514-messagepack-for-c-denial-of-service-in-unsafeblitformatterbase) (medium, CVSS 4, published 22 Jun 2026) ## Vulnerabilities per week 1 vulnerability in the last four weeks, up from none in the four before. | Week of | Vulns | Critical | Exploited | | --- | --- | --- | --- | | 17 Aug 2026 | 0 | 0 | 0 | | 24 Aug 2026 | 0 | 0 | 0 | | 31 Aug 2026 | 0 | 0 | 0 | | 7 Sep 2026 | 0 | 0 | 0 | | 14 Sep 2026 | 0 | 0 | 0 | | 21 Sep 2026 | 0 | 0 | 0 | | 28 Sep 2026 | 0 | 0 | 0 | | 5 Oct 2026 | 0 | 0 | 0 | | 12 Oct 2026 | 1 | 0 | 0 | | 19 Oct 2026 | 0 | 0 | 0 | | 26 Oct 2026 | 0 | 0 | 0 | | 2 Nov 2026 | 0 | 0 | 0 | | 9 Nov 2026 | 0 | 0 | 0 | ## Other NuGet technologies - [Microsoft.ChakraCore (NuGet)](https://junglewise.ai/threats/technologies/microsoft-chakracore): 247 vulnerabilities - [Magick.NET-Q16-AnyCPU (NuGet)](https://junglewise.ai/threats/technologies/magick-net-q16-anycpu): 167 vulnerabilities - [Magick.NET-Q16-HDRI-AnyCPU (NuGet)](https://junglewise.ai/threats/technologies/magick-net-q16-hdri-anycpu): 162 vulnerabilities - [Magick.NET-Q8-AnyCPU (NuGet)](https://junglewise.ai/threats/technologies/magick-net-q8-anycpu): 162 vulnerabilities - [Magick.NET-Q16-HDRI-x86 (NuGet)](https://junglewise.ai/threats/technologies/magick-net-q16-hdri-x86): 160 vulnerabilities - [Magick.NET-Q8-x86 (NuGet)](https://junglewise.ai/threats/technologies/magick-net-q8-x86): 160 vulnerabilities - [Magick.NET-Q16-x86 (NuGet)](https://junglewise.ai/threats/technologies/magick-net-q16-x86): 159 vulnerabilities - [Magick.NET-Q16-arm64 (NuGet)](https://junglewise.ai/threats/technologies/magick-net-q16-arm64): 157 vulnerabilities - [Magick.NET-Q16-HDRI-OpenMP-arm64 (NuGet)](https://junglewise.ai/threats/technologies/magick-net-q16-hdri-openmp-arm64): 157 vulnerabilities - [Magick.NET-Q16-HDRI-x64 (NuGet)](https://junglewise.ai/threats/technologies/magick-net-q16-hdri-x64): 157 vulnerabilities - [Magick.NET-Q16-OpenMP-arm64 (NuGet)](https://junglewise.ai/threats/technologies/magick-net-q16-openmp-arm64): 157 vulnerabilities - [Magick.NET-Q16-OpenMP-x64 (NuGet)](https://junglewise.ai/threats/technologies/magick-net-q16-openmp-x64): 157 vulnerabilities ## Sources NVD, GitHub Security Advisories, OSV, the CISA Known Exploited Vulnerabilities catalog, FIRST EPSS and vendor advisories. Rebuilt every hour. Cite as: Junglewise Threat Intelligence, "MessagePack (NuGet) vulnerabilities", https://junglewise.ai/threats/technologies/messagepack, 9 November 2026.