CVE-2026-77423 (GCVE-0-2026-77423)

Vulnerability from cvelistv5 – Published: 2026-09-23 18:17 – Updated: 2026-09-24 14:10
VLAI
Title
JLine: ReDoS in Built-in Less Viewer Search
Summary
JLine is a Java library for handling console input. From 3.0.0 until 3.30.15 and 4.3.1, the JLine built-in less viewer passes user-controlled search and display-filter patterns from getPattern(boolean doDisplayPattern) in builtins/src/main/java/org/jline/builtins/Less.java directly to Java's backtracking regular expression engine and repeatedly applies them to file content. A nested-quantifier expression evaluated against non-matching lines can consume excessive CPU and indefinitely block the session thread, and repeated sessions in Telnet or SSH deployments can exhaust a bounded worker pool. This issue is fixed in versions 3.30.15 and 4.3.1.
Severity
7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
SSVC
Exploitation: poc Automatable: yes Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-24 14:10 UTC
CWE
  • CWE-1333 - Inefficient Regular Expression Complexity
Assigner
References
Impacted products
Vendor Product Version CPE status
jline jline3 Affected: >= 3.0.0, < 3.30.15
Affected: >= 4.0.0, < 4.3.1
guessed Create a notification for this product.
Show details on NVD website
To clipboard 

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