<?xml version="1.0" encoding="utf-8" standalone="yes"?><rss version="2.0" xmlns:atom="http://www.w3.org/2005/Atom"><channel><title>Fastjson — PoC Archive</title><link>https://poc.intelseclab.com/tags/fastjson/</link><description>Latest proof-of-concept entries.</description><generator>Hugo</generator><language>en-us</language><lastBuildDate>Fri, 31 Jul 2026 00:00:00 +0000</lastBuildDate><atom:link href="https://poc.intelseclab.com/tags/fastjson/index.xml" rel="self" type="application/rss+xml"/><item><title>Alibaba Fastjson 1.x checkAutoType Bypass to Remote Code Execution via jar:http SSRF and fd-Reread Trick (CVE-2026-16723)</title><link>https://poc.intelseclab.com/pocs/web/2026-07-31_cve-2026-16723-fastjson-rce/</link><pubDate>Fri, 31 Jul 2026 00:00:00 +0000</pubDate><guid>https://poc.intelseclab.com/pocs/web/2026-07-31_cve-2026-16723-fastjson-rce/</guid><description>Critical severity (CVSS 9) — web · CVE-2026-16723. Status: PoC (no vendor patch, Fastjson 1.x line unpatched). Affects: Alibaba Fastjson (Java JSON library), packaged inside a Spring Boot executable fat-JAR. Tags: fastjson, deserialization, rce, java, spring-boot, autotype-bypass, jar-protocol, ssrf.</description><category>web</category><category>Critical</category><category>fastjson</category><category>deserialization</category><category>rce</category><category>java</category><category>spring-boot</category><category>autotype-bypass</category><category>jar-protocol</category><category>ssrf</category></item></channel></rss>