What’s Vulnerable › Vulnerabilities

CVE-2026-8484: Heap buffer overflow in Jansi

• Severity: medium (CVSS 4.8 v4.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-06-16 · updated 2026-10-26
• Weakness: CWE-122

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.

Affected products

• FuseSource jansi: through 2.4.3

References

• https://cert.pl/en/posts/2026/06/CVE-2026-8484
• https://github.com/fusesource/jansi/tree/master

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