CVE-2026-8484— Heap buffer overflow in Jansi
Possible ATT&CK Techniques 1AI
T1203 · Exploitation for Client ExecutionAffected Version Matrix 1
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| FuseSource | jansi | ≤ 2.4.3 | affected |
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I. Basic Information for CVE-2026-8484
Vulnerability Information
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Vulnerability Title
Heap buffer overflow in Jansi
Source: NVD (National Vulnerability Database)
Vulnerability Description
A heap buffer overflow vulnerability exists in the Jansi JNI "ioctl()" wrapper due to a lack of size verification for the argument array before the system call. This can lead to heap corruption and application crashes (DoS). All versions are believed to be vulnerable. This project is unmaintained at the time of CVE assignment.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
堆缓冲区溢出
Source: NVD (National Vulnerability Database)
Vulnerability Title
FuseSource Jansi 缓冲区错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
FuseSource Jansi是FuseSource个人开发者的一个小型 Java 库，让你能在 Windows 等平台上使用 ANSI 转义序列格式化控制台输出，并自动处理终端检测、代码过滤和平台适配。 FuseSource Jansi 2.4.3及之前版本存在缓冲区错误漏洞，该漏洞源于ioctl() JNI包装函数在系统调用前对于参数数组的大小验证缺失，导致堆缓冲区溢出，进而造成堆损坏和应用程序崩溃（拒绝服务）。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| FuseSource | jansi | 0 ~ 2.4.3 | - |
II. Public POCs for CVE-2026-8484
| # | POC Description | Source Link | Shenlong Link |
|---|
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Security Blog Posts for CVE-2026-8484 (1)
- 🔗 Vulnerability in jansi library | CERT Polskathird-party-advisory
Vendor Pages for CVE-2026-8484 (1)
IV. Related Vulnerabilities
Same weakness: CWE-122
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Xdgmime: heap-based buffer overflow in _xdg_mime_magic_parse - CVE-2026-48373
Acrobat Reader | Heap-based Buffer Overflow (CWE-122) - CVE-2026-44251
Wazuh : size_t underflow in msgs.c ReadSecMSG causes wazuh-r
V. Comments for CVE-2026-8484
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