All vulnerabilities
CVE-2026-16723

Remote Code Execution in fastjson 1.2.68–1.2.83

Alibaba Fastjson
Open in ThreatlineRecord JSON
CVSS
9.0Critical
ExploitationNo known exploitationNot in CISA KEV, which does not prove it is unexploitedCISA KEV
Exploit odds (EPSS)0.66%Chance of exploitation activity in the next 30 days, higher than 51% of CVEs. Scored 23 Oct 2026FIRST EPSS
Fixed inNone listedNo source names a fixed version. Check the vendor advisory below
Published23 Jul 2026Updated 23 Jul 2026CVE List

What fixes it

No source in this snapshot names a fixed version. The vendor advisories under References are the place to check.

Timeline

  1. 23 Jul 2026, 08:26 UTCPublishedCVE List
  2. 23 Oct 2026, 15:08 UTCExploit code publicGitHub proof-of-concept repositories

Reports 1

1 outlet mention it. Reports are not confirmation; each links to its source.

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.

Text from CVE List

Affected versions 1

  • Fastjsonaffected: 1.2.68 through 1.2.83CVE List

References 1