Resource exhaustion in Jline Jline3

CVE-2026-56741

JLine is a Java library for handling console input. Prior to 3.30.14, 4.0.16, and 4.2.1, the JLine3 Telnet server remote-telnet module does not apply an upper bound to terminal dimensions received via the Telnet NAWS option, and TelnetIO.h…

Vulnerability class: DoS (Denial of Service)

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

Affected products

  • Jline Jline3 — versions < 3.30.14, >= 4.0.0, < 4.0.16, >= 4.1.0, < 4.2.1

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2026-56741?
CVE-2026-56741 is a high-severity vulnerability in Jline Jline3, classified under Uncontrolled Resource Consumption. CVSS score: 7.5/10. Published 2026-07-17.
How severe is CVE-2026-56741?
High severity. CVSS v3 base score is 7.5 out of 10.