https://cve.radiocsirt.org Contains only the most 10 recent entries. http://www.rssboard.org/rss-specification python-feedgen en Tue, 06 Oct 2026 11:44:15 +0000 https://cve.radiocsirt.org/vuln/euvd-2026-330327 EUVD-2026-330327 https://cve.radiocsirt.org/vuln/euvd-2026-330327 https://cve.radiocsirt.org/vuln/fkie_cve-2026-48515 <p>MessagePack for C# is a MessagePack serializer for C#. Prior to 2.5.301 and 3.1.7, MessagePack-CSharp&#39;s multi-dimensional array formatters read dimension lengths directly from the payload and allocate T[,], T[,,], or T[,,,] before validating that the dimension product matches the encoded element count. The formatter reads a guarded element array header, but allocation of the target multi-dimensional array happens before the dimensions are checked against that element count. A small payload can therefore declare large dimensions, provide an empty or tiny inner array, and cause a large heap allocation before element data is validated. This vulnerability is fixed in 2.5.301 and 3.1.7.</p> <p>MessagePack for C# is a MessagePack serializer for C#. Prior to 2.5.301 and 3.1.7, MessagePack-CSharp&#39;s multi-dimensional array formatters read dimension lengths directly from the payload and allocate T[,], T[,,], or T[,,,] before validating that the dimension product matches the encoded element count. The formatter reads a guarded element array header, but allocation of the target multi-dimensional array happens before the dimensions are checked against that element count. A small payload can therefore declare large dimensions, provide an empty or tiny inner array, and cause a large heap allocation before element data is validated. This vulnerability is fixed in 2.5.301 and 3.1.7.</p> https://cve.radiocsirt.org/vuln/fkie_cve-2026-48515 https://cve.radiocsirt.org/vuln/ghsa-cxmj-83gh-fp49 <p><strong>Affected:</strong> NuGet: MessagePack</p> <p>## Summary</p> <p>MessagePack-CSharp&#39;s multi-dimensional array formatters read dimension lengths directly from the payload and allocate `T[,]`, `T[,,]`, or `T[,,,]` before validating that the dimension product matches the encoded element count.</p> <p>The formatter reads a guarded element array header, but allocation of the target multi-dimensional array happens before the dimensions are checked against that element count. A small payload can therefore declare large dimensions, provide an empty or tiny inner array, and cause a large heap allocation before element data is validated.</p> <p>## Impact</p> <p>Applications are affected when they deserialize untrusted MessagePack payloads into models containing multi-dimensional arrays such as `T[,]`, `T[,,]`, or `T[,,,]`.</p> <p>An attacker can encode large dimension integers and a small guarded element array. The formatter allocates the target array from the dimensions before confirming that the product of dimensions is consistent with the element count.</p> <p>The result can be out-of-memory exceptions, container termination on memory-constrained hosts, large object heap pressure, or severe CPU cost from zero-initializing oversized arrays. `MessagePackSecurity.UntrustedData` does not provide a general allocation cap for this path.</p> <p>## Affected components</p> <p>- Package: `MessagePack` - APIs: `TwoDimensionalArrayFormatter&lt;T&gt;.Deserialize`, `ThreeDimensionalArrayFormatter&lt;T&gt;.Deserialize`, `FourDimensionalArrayFormatter&lt;T&gt;.Deserialize` - Data shapes: `T[,]`, `T[,,]`, and…</p> <p><strong>Affected:</strong> NuGet: MessagePack</p> <p>## Summary</p> <p>MessagePack-CSharp&#39;s multi-dimensional array formatters read dimension lengths directly from the payload and allocate `T[,]`, `T[,,]`, or `T[,,,]` before validating that the dimension product matches the encoded element count.</p> <p>The formatter reads a guarded element array header, but allocation of the target multi-dimensional array happens before the dimensions are checked against that element count. A small payload can therefore declare large dimensions, provide an empty or tiny inner array, and cause a large heap allocation before element data is validated.</p> <p>## Impact</p> <p>Applications are affected when they deserialize untrusted MessagePack payloads into models containing multi-dimensional arrays such as `T[,]`, `T[,,]`, or `T[,,,]`.</p> <p>An attacker can encode large dimension integers and a small guarded element array. The formatter allocates the target array from the dimensions before confirming that the product of dimensions is consistent with the element count.</p> <p>The result can be out-of-memory exceptions, container termination on memory-constrained hosts, large object heap pressure, or severe CPU cost from zero-initializing oversized arrays. `MessagePackSecurity.UntrustedData` does not provide a general allocation cap for this path.</p> <p>## Affected components</p> <p>- Package: `MessagePack` - APIs: `TwoDimensionalArrayFormatter&lt;T&gt;.Deserialize`, `ThreeDimensionalArrayFormatter&lt;T&gt;.Deserialize`, `FourDimensionalArrayFormatter&lt;T&gt;.Deserialize` - Data shapes: `T[,]`, `T[,,]`, and…</p> https://cve.radiocsirt.org/vuln/ghsa-cxmj-83gh-fp49