https://cve.radiocsirt.org Contains only the most 10 recent entries. http://www.rssboard.org/rss-specification python-feedgen en Tue, 06 Oct 2026 17:58:24 +0000 https://cve.radiocsirt.org/vuln/euvd-2026-330302 EUVD-2026-330302 https://cve.radiocsirt.org/vuln/euvd-2026-330302 https://cve.radiocsirt.org/vuln/fkie_cve-2026-48513 <p>MessagePack for C# is a MessagePack serializer for C#. Prior to 2.5.301 and 3.1.7, runtime-generated union deserializers emitted by DynamicUnionResolver do not call MessagePackSecurity.DepthStep(ref reader) and do not decrement reader.Depth around recursive deserialization and skip paths. This means union deserialization does not consistently participate in the maximum object graph depth enforcement that protects other recursive formatter paths. For unknown union keys, the emitted deserializer calls reader.Skip() on attacker-controlled data without an enclosing depth step. 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, runtime-generated union deserializers emitted by DynamicUnionResolver do not call MessagePackSecurity.DepthStep(ref reader) and do not decrement reader.Depth around recursive deserialization and skip paths. This means union deserialization does not consistently participate in the maximum object graph depth enforcement that protects other recursive formatter paths. For unknown union keys, the emitted deserializer calls reader.Skip() on attacker-controlled data without an enclosing depth step. This vulnerability is fixed in 2.5.301 and 3.1.7.</p> https://cve.radiocsirt.org/vuln/fkie_cve-2026-48513 https://cve.radiocsirt.org/vuln/ghsa-wfr3-xj75-pfwh <p><strong>Affected:</strong> NuGet: MessagePack</p> <p>## Summary</p> <p>Runtime-generated union deserializers emitted by `DynamicUnionResolver` do not call `MessagePackSecurity.DepthStep(ref reader)` and do not decrement `reader.Depth` around recursive deserialization and skip paths.</p> <p>This means union deserialization does not consistently participate in the maximum object graph depth enforcement that protects other recursive formatter paths. For unknown union keys, the emitted deserializer calls `reader.Skip()` on attacker-controlled data without an enclosing depth step.</p> <p>## Impact</p> <p>Applications are affected when they deserialize untrusted payloads into object graphs containing `[Union]`-decorated interfaces or abstract classes handled by `DynamicUnionResolver`.</p> <p>An attacker can provide a union payload with an unknown key and a deeply nested value. Because the generated union formatter does not enter the depth accounting scope before skipping or recursively processing the value, configured depth limits can be bypassed. In combination with recursive skip behavior, this can terminate the process with an uncatchable `StackOverflowException`.</p> <p>This issue is narrower than the general `TrySkip()` recursion issue because it specifically concerns a formatter-generation path that fails to count union nesting. It remains independently fixable because the emitted IL should mirror the depth-step behavior used by source-generated union formatters and dynamic object formatters.</p> <p>## Affected components</p> <p>- Package: `MessagePack` - API: `DynamicUnion…</p> <p><strong>Affected:</strong> NuGet: MessagePack</p> <p>## Summary</p> <p>Runtime-generated union deserializers emitted by `DynamicUnionResolver` do not call `MessagePackSecurity.DepthStep(ref reader)` and do not decrement `reader.Depth` around recursive deserialization and skip paths.</p> <p>This means union deserialization does not consistently participate in the maximum object graph depth enforcement that protects other recursive formatter paths. For unknown union keys, the emitted deserializer calls `reader.Skip()` on attacker-controlled data without an enclosing depth step.</p> <p>## Impact</p> <p>Applications are affected when they deserialize untrusted payloads into object graphs containing `[Union]`-decorated interfaces or abstract classes handled by `DynamicUnionResolver`.</p> <p>An attacker can provide a union payload with an unknown key and a deeply nested value. Because the generated union formatter does not enter the depth accounting scope before skipping or recursively processing the value, configured depth limits can be bypassed. In combination with recursive skip behavior, this can terminate the process with an uncatchable `StackOverflowException`.</p> <p>This issue is narrower than the general `TrySkip()` recursion issue because it specifically concerns a formatter-generation path that fails to count union nesting. It remains independently fixable because the emitted IL should mirror the depth-step behavior used by source-generated union formatters and dynamic object formatters.</p> <p>## Affected components</p> <p>- Package: `MessagePack` - API: `DynamicUnion…</p> https://cve.radiocsirt.org/vuln/ghsa-wfr3-xj75-pfwh