CVE-2026-44375
high
CVSS v3
7.5
CVSS v4 NEW
—
VIR risk
7.5
Description
Nerdbank.MessagePack: Attacker-controlled stackalloc in DateTime decoding causes process-terminating StackOverflowException
Predictions
Exploit likelihood
83%
Patch ETA
—
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
No mitigations published for this CVE yet.
The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.
✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here withsource_tier=community-verified.
Package impact
| Ecosystem | Package | Vulnerable | Fixed |
|---|---|---|---|
| NuGet | Nerdbank.MessagePack | <1.1.62 | 1.1.62 |
| NUGET | Nerdbank.MessagePack | < 1.1.62 | 1.1.62 |
References
- https://github.com/AArnott/Nerdbank.MessagePack/commit/7d1eb319cfabe7280e70699946c9a48579fa2f30
- https://github.com/AArnott/Nerdbank.MessagePack/pull/941
- https://github.com/AArnott/Nerdbank.MessagePack/releases/tag/v1.1.62
- 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
- https://github.com/msgpack/msgpack/blob/master/spec.md#timestamp-extension-type
- https://github.com/advisories/GHSA-2cwq-pwfr-wcw3
CWEs
CWE-789
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.