Track vulnerabilities like this one.
Sign up free to get alerted when software you use is affected.
Fastjson2 Can't Handle Certain JSON Data
published 1 year ago
Summary
The Fastjson2 library, used for processing JSON data, can fail in certain situations, potentially allowing an attacker to disrupt the system. This affects applications that rely on Fastjson2 to parse JSON input. Update Fastjson2 to a secure version to resolve the issue.
What to do
The CVE record does not list a fixed version. Check the vendor's site or the advisory links below - a fix may already be released.
Affected software
| Ecosystem | Vendor | Product | Affected versions |
|---|---|---|---|
| OSS-Fuzz | – | fastjson2 | All versions |
Original advisory text
Security exception in com.alibaba.fastjson2.JSONReader.readArray
OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=431584944
```
Crash type: Security exception
Crash state:
com.alibaba.fastjson2.JSONReader.readArray
java.base/java.nio.charset.CharsetEncoder.<init>
java.base/java.nio.charset.CharsetEncoder.<init>
```
```
Crash type: Security exception
Crash state:
com.alibaba.fastjson2.JSONReader.readArray
java.base/java.nio.charset.CharsetEncoder.<init>
java.base/java.nio.charset.CharsetEncoder.<init>
```
References
- https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=431584944 Third Party Advisory
Timeline
Published15 Jul 2025
Updated13 Mar 2026
First seen13 Mar 2026
Track software like this
Free during beta