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China’s Great Firewall suffers its biggest leak ever as 500GB of source code and docs spill online — censorship tool has been sold to three different countries

ID: a3e339c6-d67c-5d9e-88f6-3af0a3f3ceda

STIX ID: report--a3e339c6-d67c-5d9e-88f6-3af0a3f3ceda

Feed Name: DataBreaches.Net

Threat Score
86/100

Date Published: 2025-09-13

Date Updated: 2026-04-19

Author: Dissent

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A reported 500GB+ leak exposed internal documents, source code, build systems, and operational runbooks linked to China’s Great Firewall, allegedly originating from Geedge Networks and the Chinese Academy of Sciences’ MESA lab, revealing capabilities for DPI-based VPN detection, SSL fingerprinting, and full-session logging.

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