Detections
Analytics

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

high Tenable Self-Hosted Container Security Plugin ID 463785

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 apply an upper bound to terminal dimensions received via the Telnet
 NAWS option, and TelnetIO.handleNAWS() in TelnetIO.java:856-879 reads client-supplied width and height as
 16-bit unsigned integers and passes values such as 65535x65535 to setTerminalGeometry(), allowing an
 unauthenticated remote attacker to repeatedly alternate values and trigger continuous expensive rendering
 work that causes CPU exhaustion and denial of service. This issue is fixed in versions 3.30.14, 4.0.16,
 and 4.2.1. (CVE-2026-56741)

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-2026-56741

Plugin Details

Severity: High

ID: 463785

Version: Revision 1.1

Type: Local

Published: 10/2/2026

Updated: 10/3/2026

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-2026-56741

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-2026-56741