Detections
Analytics

Echo: org.jline:jline-remote-telnet: security update to 3.30.14

high Tenable Cloud Security Plugin ID 460314

Description

There are packages installed that are affected by a vulnerability referenced in the following CVE:

 - 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. (CVE-2026-56740)

Solution

Update the org.jline:jline-remote-telnet library and its related packages to version 3.30.14 or later.

See Also

https://advisory.echohq.com/cve/CVE-2026-56740

Plugin Details

Severity: High

ID: 460314

Version: Revision 1.1

Type: Local

Published: 10/2/2026

Updated: 10/5/2026

Supported Sensors: Tenable Cloud Security, Tenable Self-Hosted Container Security

Risk Information

VPR

Risk Factor: Low

Score: 3

Percentile: 23.67

CVSS v2

Risk Factor: High

Base Score: 7.8

Temporal Score: 6.1

Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:C

CVSS Score Source: CVE-2026-56740

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.7

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Temporal Vector: CVSS:3.0/E:P/RL:O/RC:C

Vulnerability Information

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 9/28/2026

Vulnerability Publication Date: 6/18/2026

Reference Information

CVE: CVE-2026-56740