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Dossier · Vulnerability

Vulnerability

CVE-2026-16723

Signals

Exploited in the wild
Not on KEVNot in CISA's catalogue as of the last daily pull. Absence is not proof of safety.
EPSS · 30-day forecast
1%Chance of exploitation in the next 30 days, 51th percentile of all CVEs. A forecast; KEV outranks it.
CVSS · NVD
not stated by sourcesNo NVD record yet.
Internet exposure
not stated by sourcesNo exposure census on this CVE's dispatches.

Exploits

11 known · links only

GitHub PoCs · by trust, then stars11

  1. dinosn/fastjson-jsontype-rce-lab ↗Trust ok 100

    Docker labs + defensive scanner for fastjson remote-class-load RCE. fastjson 1.2.66-1.2.83: @JSONType resource probe (CVE-2026-16723). fastjson2 2.0.57: attacker @type reaches loadClass with autoType DISABLED via polymorphic types (@JSONType(seeAlso) / Jackson @JsonSubTypes). Marker-only payloads; safeMode + JDK17 controls.

    ★ 206 · created 2026-07-20

  2. learner330/fastjson-cve-2026-16723 ↗Trust ok 100

    ★ 5 · created 2026-08-05

  3. why-success/fastjson-rce-lab ↗Trust ok 100

    Fastjson 1.2.83 RCE 靶场环境 (CVE-2026-16723)

    ★ 4 · created 2026-07-28

  4. 1xPwn/CVE-2026-16723 ↗Trust ok 100

    A critical vulnerability affecting Fastjson versions 1.2.68 – 1.2.83.

    ★ 3 · created 2026-07-30

  5. EQSTLab/CVE-2026-16723 ↗Trust ok 100

    Fastjson RCE

    ★ 1 · created 2026-07-30

  6. fazilbaig1/CVE-2026-16723 ↗Trust ok 100

    This is N-day patch we releasing by testing our model capabilities

    ★ 1 · created 2026-07-31

  7. HORKimhab/CVE-2026-16723 ↗Trust ok 100

    CVE-2026-16723

    ★ 1 · created 2026-07-25

  8. Superman-L/CVE-2026-16723 ↗Trust ok 100

    fastjson jsontype利用

    ★ 1 · created 2026-08-19

  9. yym8538/CVE-2026-16723 ↗Trust ok 100

    ★ 1 · created 2026-08-21

  10. ipisav/fastjson-cve ↗Trust ok 100

    fastjson-cve-2026-16723

    ★ 0 · created 2026-08-28

  11. xiaoqiMikko/fastjson-check ↗Trust ok 100

    fastjson vulnerability scanner - detect fastjson in JARs and Spring Boot fat-JARs, check exposure to CVE-2026-16723, and verify whether you already run the official patch 1.2.84. Zero-dependency offline CLI. fastjson 漏洞检测与排查工具：一条命令扫描依赖，支持 fat-JAR 与 shaded 依赖，并判定是否已升到官方补丁版本 1.2.84。

    ★ 0 · created 2026-08-03

Fake proof-of-concept repositories have been used to deliver malware to the researchers who run them. The trust verdict is our engine's heuristic over the repository (account age, what it ships, how its stars arrived); it is a reason to read the code first, not a finding about its author.

On the wire

1 dispatch
  1. Fastjson 1.x RCE Vulnerability Targeted in Attacks With No Patched AvailableVULN

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