Signal is active with 1 mentions in latest observed window
Recommended action window: Monitor and triage in normal cycle
NVD description
MessagePack for C# is a MessagePack serializer for C#. Prior to 2.5.301 and 3.1.7, MessagePackReader.TrySkip() recursively descends into nested arrays and maps without incrementing the reader depth or calling the configured depth checks. This bypasses MessagePackSecurity.MaximumObjectGraphDepth, the library's documented protection against deeply nested object graphs. Many generated and dynamic formatters call reader.Skip() when they encounter unknown map keys, unknown array members, ignored fields, or data that should be skipped for forward compatibility. A deeply nested value in one of these skipped positions can therefore cause unbounded recursion and an uncatchable StackOverflowException. This vulnerability is fixed in 2.5.301 and 3.1.7.
Priority
LOW
Exploitation
NONE
PoC
NONE
Patch
NONE
Momentum
NONE
If you run products in this scope, you should treat this CVE as relevant to your environment.
🔴 MessagePack-CSharp, Uncontrolled Recursion, #CVE-2026-48506 (High) -DC-Jun2026-640 https://dailycve.com/messagepack-csharp-uncontrolled-recursion-cve-2026-48506-high-dc-jun2026-640/
Post summary
An advisory notes the discovery of an uncontrolled recursion flaw (CVE-2026-48506) in MessagePack-CSharp with high severity, but does not provide PoC, exploit code, or direct mitigation details.
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| Part | Vendor | Product | Version | Target SW | Target HW |
|---|---|---|---|---|---|
| App | messagepack | messagepack | - | c\# | - |