Brotli: Out-of-bounds write in the Brotli decoder ("Node2Shell") also affects the PyPI Brotli package

影響: pip:brotli >= 1.0.3, < 1.2.1 → 1.2.1, pip:brotlicffi >= 1.0.3, < 1.2.1.0 → 1.2.1.0

A buffer overflow vulnerability in the Brotli decoder (c/dec/decode.c) in Google Brotli versions 1.0.3 through 1.2.0 on all platforms allows a remote unauthenticated attacker to corrupt adjacent decoder state memory, disclose sensitive memory contents, cause a denial of service, or potentially execute arbitrary code using a crafted Brotli-compressed stream. Users need to update any Brotli libraries or binaries between 1.0.3 through 1.2.0 to the latest available version: 1.0.10 or 1.1.1 or 1.2.1.

Read on GitHub Advisory Database

On 10/23/2026, 12:32 AM, GitHub Advisory Database published "Brotli: Out-of-bounds write in the Brotli decoder ("Node2Shell") also affects the PyPI Brotli package" (type: Advisory). Severity is "Critical" (critical). Related technologies: Python.