What is CVE-2026-44375?

CVE-2026-44375 is a high-severity vulnerability in Aarnott Nerdbank.messagepack, classified under CWE-789. CVSS score: 7.5/10. Published 2026-05-14.

How severe is CVE-2026-44375?

High severity. CVSS v3 base score is 7.5 out of 10.

Vulnerability in Aarnott Nerdbank.messagepack

CVE-2026-44375

Nerdbank.MessagePack is a NativeAOT-compatible MessagePack serialization library. Prior to 1.1.62, Nerdbank.MessagePack contains an uncontrolled stack allocation vulnerability in DateTime decoding. A malicious MessagePack payload can decla…

EPSS: 0.001 (17.4th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

Affected products

Aarnott Nerdbank.messagepack — versions < 1.1.62

Weakness classification (CWE)

CWE-789

References

security-advisories@github.com (x_refsource_MISC)
security-advisories@github.com (x_refsource_MISC)
security-advisories@github.com (x_refsource_MISC)
security-advisories@github.com (x_refsource_CONFIRM)

Frequently asked questions

What is CVE-2026-44375?: CVE-2026-44375 is a high-severity vulnerability in Aarnott Nerdbank.messagepack, classified under CWE-789. CVSS score: 7.5/10. Published 2026-05-14.
How severe is CVE-2026-44375?: High severity. CVSS v3 base score is 7.5 out of 10.