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RCE Vulnerabilities in Log4j, Spring, Fastjson: Overview & POC Code

github.com 2026-10-17 English translation pending; showing Chinese 查看中文 →
Security Advisory Critical Countly
Affected:
  • Apache Log4j 2.0-beta9 to 2.14.1
  • Spring Framework 5.3.0 to 5.3.17
  • Fastjson 1.2.47 to 1.2.68
Fixed in:
  • Apache Log4j 2.15.0
  • Spring Framework 5.3.18
  • Fastjson 1.2.69
Referenced CVEs: CVE-2026-42269 · 8.1
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