Will FastJson RCE zero-day be patched by end of August 2026?
[Auto-closed — deadline passed with no qualifying event] Deadline was 2026-08-04 (today is 2026-08-05). No evidence of a patch or security advisory from Alibaba (FastJson maintainer) or CISA KEV addition confirming a patched version. The deadline has passed with zero credible evidence of patch availability.
Evidence: https://threatodds.com/markets/4ae2cdc0-747e-4f78-b623-9e9b48a43851Market Overview
AI GENERATEDHackers are actively exploiting a zero-day vulnerability in FastJson (open-source Java library) enabling remote code execution without user interaction or elevated privileges (per Bleeping Computer). Vendors and organizations using FastJson are at immediate risk.
Primary SourceResolution Criteria
An official patch or security advisory from Alibaba (FastJson maintainer) or CISA KEV addition confirming patched version number. YES if patch is available by deadline; NO if no patch released or vulnerability still being actively exploited.