Inefficient Regular Expression Complexity Affecting akhq package, versions <0.28.0-r9


Severity

Recommended
low

Based on default assessment until relevant scores are available.

Threat Intelligence

EPSS
0.12% (2nd percentile)

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  • Snyk IDSNYK-WOLFILATEST-AKHQ-20125640
  • published24 Sept 2026
  • disclosed23 Sept 2026

Introduced: 23 Sep 2026

NewCVE-2026-77420  (opens in a new tab)
CWE-1333  (opens in a new tab)

How to fix?

Upgrade Wolfi akhq to version 0.28.0-r9 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream akhq package and not the akhq package as distributed by Wolfi. See How to fix? for Wolfi relevant fixed versions and status.

JLine is a Java library for handling console input. From 3.0.0 until 3.30.15 and 4.3.1, DefaultHistory.matchPatterns(String patterns, String line) in reader/src/main/java/org/jline/reader/impl/history/DefaultHistory.java converts the HISTORY_IGNORE configuration value into a Java regular expression while escaping only part of its syntax, allowing other regex metacharacters to reach the backtracking engine. An attacker who can control application or user configuration can supply a nested-quantifier expression that is reevaluated whenever a command is added to history, consuming excessive CPU and indefinitely blocking the reader thread. This issue is fixed in versions 3.30.15 and 4.3.1.

CVSS Base Scores

version 3.1