CVE-2026-16723
Remote Code Execution in fastjson 1.2.68–1.2.83
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.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- High
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Exploit likelihood
What each source reports
CVE List Score used
Remote Code Execution in fastjson 1.2.68–1.2.83
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.
- Record
CVE-2026-16723- CVSS 3.1
- 9.0 Critical
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H - Weakness
- CWE-20, CWE-502
- Updated
- 2026-11-02
EUVDEUVD-2026-47929
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.
- Record
EUVD-2026-47929- CVSS 3.1
- 9.0 Critical
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H - Updated
- 2026-11-02
GitHub AdvisoriesGHSA-crf3-v9rr-v7hj
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.
- Record
GHSA-crf3-v9rr-v7hj- CVSS 3.1
- 9.0 Critical
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H - Weakness
- CWE-20
- Updated
- 2026-11-02
NVD
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.
- Record
CVE-2026-16723- CVSS 3.1
- 9.0 Critical
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H - Weakness
- CWE-20, CWE-502
- Updated
- 2026-11-02
OSVGHSA-crf3-v9rr-v7hj
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.
- Record
GHSA-crf3-v9rr-v7hj- CVSS 3.1
- 9.0 Critical
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H - Weakness
- CWE-20
- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
com.alibaba:fastjsonMaven |
1.2.68 to 1.2.83 | None known |
com.alibaba:fastjsonMaven |
1.2.68 to 1.2.83, plus listed versions 1.2.68.sec101.2.691.2.69_noneautotype1.2.69_sec111.2.69_sec12 Show 14 moreShow less1.2.701.2.711.2.71_noneautotype1.2.721.2.72_noneautotype1.2.731.2.741.2.751.2.75_noneautotype1.2.761.2.771.2.781.2.791.2.80 |
None known |
Public exploits
Links only. Every CVE stores no exploit code.
| Source | Link | Date |
|---|---|---|
| PoC in GitHub | 1xPwn/CVE-2026-16723 | 2026-07-30 |
| PoC in GitHub | EQSTLab/CVE-2026-16723 | 2026-07-30 |
| PoC in GitHub | Ethen1212/fastjson-CVE-2026-16723 | 2026-10-23 |
| PoC in GitHub | HORKimhab/CVE-2026-16723 | 2026-07-25 |
| PoC in GitHub | Superman-L/CVE-2026-16723 | 2026-08-19 |
| PoC in GitHub | cuttlefish520/FastJson1.2.83-GenProbe2 | 2026-10-19 |
| PoC in GitHub | dichen-L/CVE-2026-16723-vul | 2026-10-27 |
| PoC in GitHub | dinosn/fastjson-jsontype-rce-lab | 2026-07-20 |
| PoC in GitHub | fazilbaig1/CVE-2026-16723 | 2026-07-31 |
| PoC in GitHub | ipisav/fastjson-cve | 2026-08-28 |
Show 4 moreShow less
| Source | Link | Date |
|---|---|---|
| PoC in GitHub | learner330/fastjson-cve-2026-16723 | 2026-08-05 |
| PoC in GitHub | why-success/fastjson-rce-lab | 2026-07-28 |
| PoC in GitHub | xiaoqiMikko/fastjson-check | 2026-08-03 |
| PoC in GitHub | yym8538/CVE-2026-16723 | 2026-08-21 |
History
| Recorded | Changed | Sources |
|---|---|---|
| first indexed | CVE List, EUVD, GitHub Advisories, NVD, OSV, PoC in GitHub |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2026-16723 is a critical vulnerability (CVSS 9.0) in Alibaba Fastjson, published July 23, 2026. Public exploit code exists. EPSS puts the chance of exploitation in the next 30 days at 0.66%, the 51st percentile. No source names a fixed version.