Resource Exhaustion Affecting jline3-terminal package, versions <3.30.15-160000.1.1


Severity

Recommended
0.0
high
0
10

Based on SUSE Linux Enterprise Server security rating.

Threat Intelligence

EPSS
0.5% (41st percentile)

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  • Snyk IDSNYK-SLES1600-JLINE3TERMINAL-18344197
  • published28 Jul 2026
  • disclosed22 Jul 2026

Introduced: 22 Jul 2026

NewCVE-2026-56740  (opens in a new tab)
CWE-400  (opens in a new tab)

How to fix?

Upgrade SLES:16.0.0 jline3-terminal to version 3.30.15-160000.1.1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream jline3-terminal package and not the jline3-terminal package as distributed by SLES. See How to fix? for SLES:16.0.0 relevant fixed versions and status.

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 limit the number of environment variables a client may inject via the Telnet NEW-ENVIRON option, and TelnetIO.readNEVariables() in TelnetIO.java:1127-1180 stores each variable pair in a HashMap held by ConnectionData, allowing an unauthenticated attacker to flood unique variable pairs before the terminating IAC SE byte and exhaust JVM heap memory with an OutOfMemoryError. This issue is fixed in versions 3.30.14, 4.0.16, and 4.2.1.

CVSS Base Scores

version 3.1