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CVE-2026-106971

Integer Overflow in MessagePack BufferUnpacker Leads to Denial of Service on 32‑bit PHP

An integer overflow in the MessagePack\BufferUnpacker component of rybakit/msgpack versions prior to 0.11.0 allows attackers to cause a denial of service via crafted MessagePack input when the application runs on 32-bit PHP

CVSS 3.1 · 7.5 High EPSS < 1% KEV · Not listed
Vendors
Rybakit
Products
Msgpack.php
CVE-2026-106972

rybakit/msgpack: rybakit/msgpack: Denial of Service via uncontrolled recursion

Uncontrolled recursion in MessagePack\BufferUnpacker::unpack() in rybakit/msgpack versions prior to 0.11.0 allows attackers to cause a denial of service through memory exhaustion when an application decodes deeply nested, attacker-controlled MessagePack input.

CVSS 3.1 · 7.5 High EPSS < 1% KEV · Not listed
Vendors
Rybakit
Products
Msgpack.php