En resumen
- CVE-2026-107296 es una vulnerabilidad BAJO (CVSS 3.7) que afecta a msgpack5.
- Probabilidad de explotación en los próximos 30 días (EPSS): 0.28%, mayor que el 20.1% de las vulnerabilidades.
- Solución: actualizar a 6.1.0 o posterior.
| Package | Affected versions | Patched versions |
|---|
| msgpack5 npm | < 6.1.0
| 6.1.0
|
Description
Impact
Decoding a negative signed 64-bit integer modifies the corresponding bytes in the caller-provided input buffer. Applications that retain or reuse encoded input for integrity checks, logging, or subsequent processing may observe silently corrupted data.
Positive integers and other MessagePack value types are not affected.
Patches
The decoder now computes signed 64-bit values without writing to the input buffer.
Workarounds
Copy untrusted MessagePack input before decoding it, or do not retain or reuse input buffers after decoding.
NVD description
msgpack5 is a msgpack v5 implementation for node.js and the browser. Prior to 6.1.0, decoding a negative signed 64-bit integer modifies the corresponding bytes in the caller-provided input buffer while computing the value. Applications that retain or reuse encoded input for integrity checks, logging, or later processing can observe silently corrupted data, while positive integers and other MessagePack value types are unaffected. This issue is fixed in version 6.1.0.
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