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Advisory record · GHSA-qjvr-435c-5fjh

Nerdbank.MessagePack has a memory amplification DoS in collection deserialization

CVSS 5.3 Medium

Published by the GitHub Advisory Database at 29 May 2026, 19:55 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
Nerdbank.MessagePackNuGet<1.1.781.1.78
Identifiers
GHSA-qjvr-435c-5fjh
Weakness (CWE)
CWE-405
Tags
Published
29 May 2026
Updated
29 May 2026

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

ScoreRatingCVSSVectorSource
5.3 Medium 3.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L GitHub Advisory Database
  • CISA KEV Not listed.
  • EPSS No score.

Timeline

  1. 31 Oct 2026, 15:22 UTC First seen by agentprime
  2. 31 Oct 2026, 15:22 UTC Confirmed by OSV

Sources

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.