CVE-2026-16723 (GCVE-0-2026-16723)

Vulnerability from cvelistv5 – Published: 2026-07-23 08:26 – Updated: 2026-07-23 13:54
VLAI
Title
Remote Code Execution in fastjson 1.2.68–1.2.83
Summary
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.
Severity
9 (Critical)
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
  • CWE-20 - Improper input validation
  • CWE-502 - Deserialization of untrusted data
Assigner
References
URL Tags
https://github.com/alibaba/fastjson2/wiki/Securit… vendor-advisorymitigation
Impacted products
Vendor Product Version
Alibaba Fastjson Affected: 1.2.68 , ≤ 1.2.83 (custom)
Create a notification for this product.
Credits
Kirill Firsov of FearsOff Cybersecurity
Show details on NVD website
To clipboard 

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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.