Fastjson 1.x RCE Vulnerability Targeted in Attacks With No Patched Available
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Security firms ThreatBook and Imperva say attackers are targeting a critical flaw in Fastjson, Alibaba's JSON library for Java. In affected Spring Boot applications, a malicious JSON request can execute code without authentication, with the privileges of the Java process. Tracked as CVE-2026-16723, the vulnerability carries an Alibaba-assigned CVSS score of 9.0. The confirmed chain requires
1Key Takeaways
- Security firms ThreatBook and Imperva say attackers are targeting a critical flaw in Fastjson, Alibaba's JSON library for Java.
- In affected Spring Boot applications, a malicious JSON request can execute code without authentication, with the privileges of the Java process.
- Tracked as CVE-2026-16723, the vulnerability carries an Alibaba-assigned CVSS score of 9.0.
2AIWedia Score
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3Why it matters
Security headlines highlight new attack surfaces as AI gets embedded in more systems. The Hacker News reports that security firms ThreatBook and Imperva say attackers are targeting a critical flaw in Fastjson, Alibaba's JSON library for Java.
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