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
0.43% (35th percentile)

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  • Snyk IDSNYK-WOLFILATEST-AKHQ-20125638
  • published24 Sept 2026
  • disclosed23 Sept 2026

Introduced: 23 Sep 2026

NewCVE-2026-77421  (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, the JLine built-in nano editor's regex search mode passes a user-controlled search term from doSearch(String text) in builtins/src/main/java/org/jline/builtins/Nano.java to Java's backtracking regular expression engine without a timeout or backtracking bound. A nested-quantifier expression evaluated against non-matching buffer content can consume excessive CPU and indefinitely block the editor session thread, and remote multi-user deployments can lose a worker thread for each affected session. This issue is fixed in versions 3.30.15 and 4.3.1.

CVSS Base Scores

version 3.1