CVE-2026-56740: jline before 3.30.14 (exclusive), from 4.0.0 (inclusive), before 4.0.16 (exclusive), from 4.1.0 (inclusive), before…

CVE-2026-56740. CVSS 3.1 base score 7.5 (HIGH, Vendor/CNA). EPSS 0.00884 (percentile 0.5889), scored 24-Oct-2026. Fixed version: c02dd469e463c83a1eed433a6565de12cc7234b0. Fixed version: 86b7ba7801988aadb1a67555629522a71d603bd3. Fixed version: ee6981e7a8676dc2ffb5548c4527bf7e4b418ddb. Fixed version: 0389f0ee6d0375901b602671ad5dafd4d1d4ee09. Fixed version: 4ee3a73849ffb9a85ec748e4e8cd8f6d81f84f40. Fixed version: 934f09e6128cee33c2b13d42b6e859c1ee2d194b.

Affected technology

jline · before 3.30.14 (exclusive)
jline

jline · from 4.0.0 (inclusive), before 4.0.16 (exclusive)
jline

jline · from 4.1.0 (inclusive), before 4.2.1 (exclusive)
jline

jline3 · < 3.30.14, >= 4.0.0, < 4.0.16, >= 4.1.0, < 4.2.1
jline

Component: Not specified by the source

Attack conditions (Vendor/CNA, CVSS 3.1): Network (remote) · No privileges required · No user interaction required

What an attacker can do

An unauthenticated attacker can flood unique variable pairs before the terminating IAC SE byte and exhaust JVM heap memory with an OutOfMemoryError. Vendor/CNA’s CVSS 3.1 assessment (base score 7.5/10) rates confidentiality and integrity impact as none; availability impact as high.

Published 25-Oct-2026 01:00 UTC

CWE: CWE-400
CCR priority: 30.2 /100 (P4)
CVSS 3.1: 7.5 /10 · CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H · Vendor/CNA
EPSS: 0.00884 · percentile 0.5889 · 2026-10-24
KEV: no

Provenance

NVD CVE API 2.0 · Source record · observed 2026-10-25 01:28:19.133527+00:00 UTC
OSV.dev · Source record · observed 2026-10-24 16:38:25.544256+00:00 UTC

Stable permalink: https://cybercodered.org/item/cve-cve-2026-56740.html