Unsafe deserialization in com.alibaba:fastjson
The package com.alibaba:fastjson before 1.2.83 is vulnerable to Deserialization of Untrusted Data by bypassing the default autoType shutdown restrictions, which is possible under certain conditions. Exploiting this vulnerability allows attacking remote servers. Workaround: If upgrading is not possible, you can enable safeMode.
Affected software
Click a technology to see all vulnerabilities affecting it.
| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| Java / Kotlin (Maven) | com.alibaba:fastjson | >= 1.2.25, < 1.2.83 | 1.2.83 |
References
- https://nvd.nist.gov/vuln/detail/CVE-2022-25845
- https://github.com/alibaba/fastjson/commit/35db4adad70c32089542f23c272def1ad920a60d
- https://github.com/alibaba/fastjson/commit/8f3410f81cbd437f7c459f8868445d50ad301f15
- https://github.com/alibaba/fastjson
- https://github.com/alibaba/fastjson/releases/tag/1.2.83
- https://github.com/alibaba/fastjson/wiki/security_update_20220523
- https://snyk.io/vuln/SNYK-JAVA-COMALIBABA-2859222
- https://www.ddosi.org/fastjson-poc
- https://www.oracle.com/security-alerts/cpujul2022.html
- CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H- Weakness (CWE)
CWE-502- Platform
- Java / Kotlin (Maven)
- Package
com.alibaba:fastjson- Disclosed
- 11.06.2022
- Updated
- 11.10.2026 12:22
Sources and licenses
OSV / GitHub Advisory Database - GHSA-pv7h-hx5h-mgfj - CC BY 4.0
Vulnerability history: com.alibaba:fastjson
All published vulnerabilities of this package (Java / Kotlin (Maven)), newest first. Shows whether this is a one-off slip or a package that needs watching.
- Total entries
- 4
- First → latest
- 10.2018 07.2026
- Without a fix
- 1
- Exploited in attacks
- 0
Severity breakdown
- Critical 3
- High 1
Disclosures per year
- 2018: 1
- 2019: 0
- 2020: 0
- 2021: 0
- 2022: 1
- 2023: 0
- 2024: 0
- 2025: 0
- 2026: 2
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Unsafe deserialization in com.alibaba:fastjson this entry
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