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CVE

CVE-2026-16723

fastjson has a remote code execution (RCE) vulnerability
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CVE

CVE-2026-16723

fastjson has a remote code execution (RCE) vulnerability

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.

Package Versions Affected

Package Version
patch Availability
com.alibaba:fastjson 1.2.80
Available
Available by request

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CVSS Version

Severity
Base Score
CVSS Version
Score Vector
C
H
U
9
-
3.1
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H
C
H
U
0
-
3.1
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H
C
H
U
9.1
-
3.1
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H

Related Resources

No items found.

References

https://nvd.nist.gov/vuln/detail/CVE-2026-16723, https://github.com/alibaba/fastjson2, https://github.com/alibaba/fastjson2/wiki/Security-Advisory:-Remote-Code-Execution-in-fastjson-1.2.68%E2%80%931.2.83

Severity

9

CVSS Score
0
10

Basic Information

Base CVSS
9
EPSS Probability
0.00413%
EPSS Percentile
0.34678%
Introduced Version
1.2.68.sec10
Fix Available
1.2.84

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