MessagePack-CSharp: Denial of service vulnerabilities can swamp the CPU or crash the process with stack and heap over...
High-risk advisory
CVE-2026-48502
Summary
MessagePack-CSharp: Denial of service vulnerabilities can swamp the CPU or crash the process with stack and heap overflows
Why it matters
GitHub has published a reviewed security advisory for MessagePack. Prioritize it with other application dependency updates, especially because EPSS places it in the 17% percentile.
Operator check
Check whether MessagePack is present in application dependency manifests, lockfiles, or build images. Review the GitHub advisory and upgrade to a patched version where available. CVSS score: 8.2. EPSS probability: 0.3%; percentile: 17%.
Sources
PatchBrief uses public sources. It does not scan environments, verify exposure, or replace vendor guidance.