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MessagePack: Nested arrays can blow past buffer length limits

Collected exploitation and prediction evidence

Risk source coverage

CISA KEV is observed exploitation evidence. FIRST EPSS is a dated prediction of exploitation in the next 30 days. Missing scores are unknown. This collector requests predictions only for explicit CVE aliases in the public NuGet archive; Microsoft release views retain their existing prediction scope.

CVE-2026-92707

Exact risk observation. Current source statements above are a separate evidence layer. Latest risk evidence.

No KEV entry is attached to this observation; this is not evidence that exploitation is absent.

FIRST EPSS: 0.68 % · percentile 52.05 % · scored 26 Oct 2026. Retained older prediction.

Observed 27 Oct 2026 00:23:05 UTC · Complete immutable risk JSON

Immutable source observations

9 recorded revisions

Each citation identifies one complete source statement. Source modification dates and the time this installation observed them are distinct. Latest history includes records historically associated by source identifiers; a removed alias is not a current equivalence claim. Exact citations show that source record's own earlier observations. Failed reads and unchanged polls do not rewrite history.

7 Nov 2026 15:25:30 UTC

MessagePack for C# is a MessagePack serializer for C#. Prior to 2.5.303 and 3.1.9, deserializing attacker-controlled MessagePack data as System.Object through PrimitiveObjectFormatter can cause excessive memory allocation. The formatter all…

euvd · EUVD-2026-102315 · Published

5 Nov 2026 14:41:07 UTC

MessagePack for C# is a MessagePack serializer for C#. Prior to 2.5.303 and 3.1.9, deserializing attacker-controlled MessagePack data as System.Object through PrimitiveObjectFormatter can cause excessive memory allocation. The formatter all…

euvd · EUVD-2026-102315 · Published

3 Nov 2026 14:03:39 UTC

MessagePack for C# is a MessagePack serializer for C#. Prior to 2.5.303 and 3.1.9, deserializing attacker-controlled MessagePack data as System.Object through PrimitiveObjectFormatter can cause excessive memory allocation. The formatter all…

euvd · EUVD-2026-102315 · Published

1 Nov 2026 13:04:34 UTC

MessagePack for C# is a MessagePack serializer for C#. Prior to 2.5.303 and 3.1.9, deserializing attacker-controlled MessagePack data as System.Object through PrimitiveObjectFormatter can cause excessive memory allocation. The formatter all…

euvd · EUVD-2026-102315 · Published

30 Oct 2026 12:53:36 UTC

MessagePack for C# is a MessagePack serializer for C#. Prior to 2.5.303 and 3.1.9, deserializing attacker-controlled MessagePack data as System.Object through PrimitiveObjectFormatter can cause excessive memory allocation. The formatter all…

euvd · EUVD-2026-102315 · Published

28 Oct 2026 10:36:28 UTC

MessagePack for C# is a MessagePack serializer for C#. Prior to 2.5.303 and 3.1.9, deserializing attacker-controlled MessagePack data as System.Object through PrimitiveObjectFormatter can cause excessive memory allocation. The formatter all…

euvd · EUVD-2026-102315 · Published

25 Oct 2026 16:19:22 UTC

MessagePack for C# is a MessagePack serializer for C#. Prior to 2.5.303 and 3.1.9, deserializing attacker-controlled MessagePack data as System.Object through PrimitiveObjectFormatter can cause excessive memory allocation. The formatter all…

nvd · CVE-2026-92707 · Published

23 Oct 2026 16:01:25 UTC

MessagePack: Nested arrays can blow past buffer length limits

osv · GHSA-qhrr-8q5h-9q3h · Published

23 Oct 2026 15:48:27 UTC

MessagePack: Nested arrays can blow past buffer length limits

cve-program · CVE-2026-92707 · Published

ChangeIntel

An IT change radar: releases, security, known issues, retirements, documentation changes, and service status from public sources. Every item links to supporting evidence; dates and statuses can change after they are read.

Sources read 9 Nov 10:47 UTC · 275 of 275 readable · 273 fully read · documentation 469/469 current