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CVE-2026-16723

CRITICAL
9.0
CVSS 3.1
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.

Metadata

CVE ID
CVE-2026-16723
State
PUBLISHED
Assigner
alibaba
Reserved
2026-07-23 02:40 UTC
Published
2026-07-23 08:26 UTC
Last updated
2026-07-23 13:54 UTC
Primary CWE
CWE-20
CWE-20 Improper input validation
Vendor / Product
Alibaba / Fastjson
Sources
cve.org  ·  NVD

Severity & Metrics

9.0 CRITICAL CVSS 3.1
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H
SSVC — CISA Coordinator
Exploitation
none
Automatable
no
Tech. Impact
total
Affected products (1)
VendorProductPlatformVersions
Alibaba Fastjson — 1.2.68 ≤ 1.2.83
Weakness (CWE)
CWESourceDescription
CWE-20 cna CWE-20 Improper input validation
CWE-502 cna CWE-502 Deserialization of untrusted data
CVSS scores (1)
ScoreSeverityVersionSourceVector
9.0 CRITICAL 3.1 cna CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H
References (1)
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