Is Nerdbank.MessagePack affected by CVE-2026-44375?

NuGet Nerdbank.MessagePack is affected in <1.1.62.

Is CVE-2026-44375 being exploited?

Not on the CISA KEV list. EPSS exploit probability is 0.4%.

high

CVE-2026-44375

Q: Is CVE-2026-44375 being exploited?

Not on the CISA KEV list. EPSS exploit probability is 0.4%.

NuGet · Nerdbank.MessagePack

Summary

Nerdbank.MessagePack: Attacker-controlled stackalloc in DateTime decoding causes process-terminating StackOverflowException

Severity: high
EPSS: 0.4% (p27)
Also known as: GHSA-2cwq-pwfr-wcw3
Published: 2026-05-06

References

https://github.com/AArnott/Nerdbank.MessagePack/security/advisories/GHSA-2cwq-pwfr-wcw3
https://nvd.nist.gov/vuln/detail/CVE-2026-44375
https://github.com/AArnott/Nerdbank.MessagePack/pull/941

Related advisories

GHSA-92vj-hp7m-gwcj — medium · NuGet/Nerdbank.MessagePack
GHSA-qjvr-435c-5fjh — medium · NuGet/Nerdbank.MessagePack

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Sources: CISA KEV (public domain), OSV.dev & GitHub Advisory Database (CC-BY-4.0), FIRST EPSS, NVD/CWE (public domain). Served live from the Stateward advisory database.