VulnerabilityDeferred

CVE-2026-16723

A remote code execution (RCE) vulnerability exists in fastjson 1.2.68 through 1.2.83.

CRITICAL 9.0EPSS 16.0%

Does this matter?

EPSS puts the probability of exploitation in the next 30 days at 16.0%, higher than 97% of all known CVEs. Patch or mitigate before the next change window.

Description

A remote code execution (RCE) vulnerability exists in fastjson 1.2.68 through 1.2.83. This vulnerability is exploitable under fastjson's stock default configuration — no AutoType enablement required, no classpath gadget required.

CVSS 3.1: 9.0 CRITICALCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H
EPSS: 15.99% probability · 97th percentile
CISA KEV: Not listed
Weakness: CWE-20, CWE-502
Source: alibaba-cna@list.alibaba-inc.com

References

https://github.com/alibaba/fastjson2/wiki/Security-Advisory:-Remote-Code-Execution-in-fastjson-1.2.68%E2%80%931.2.83

Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.