CVE-2026-48109
1 advisory.
NuGet/MessagePack CVE-2026-48109: high 8.2, EPSS 0.51%
MessagePack's LZ4 decompression may fail with AccessViolationException after dereferencing memory from bad input
Action: Upgrade MessagePack to 2.5.301 (2.x) or 3.1.7 (3.x) or later.
Affected
| introduced | fixed | last affected |
|---|---|---|
| 0 | 2.5.301 | - |
| 3.0.214-rc.1 | 3.1.7 | - |
Fixed versions
| 2.5.301 | 3.1.7 |
Sources
- osv: GHSA-hv8m-jj95-wg3x
- https://github.com/MessagePack-CSharp/MessagePack-CSharp/security/advisories/GHSA-hv8m-jj95-wg3x
- https://nvd.nist.gov/vuln/detail/CVE-2026-48109
- https://github.com/MessagePack-CSharp/MessagePack-CSharp
CVE-2026-48109 · published · modified · JSON