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
- security-advisories@github.com (x_refsource_CONFIRM)
- security-advisories@github.com (x_refsource_MISC)
- security-advisories@github.com (x_refsource_MISC)
- security-advisories@github.com (x_refsource_MISC)
- security-advisories@github.com (x_refsource_MISC)
- security-advisories@github.com (x_refsource_MISC)
- security-advisories@github.com (x_refsource_MISC)
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.