CVE-2026-77421
Medium · 6.5CVSS
6.5
EPSS
0.4%
Published
Sep 23, 2026
CISA due date
—
The record
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.
Affected packages
| Ecosystem | Package | Introduced | Fixed |
|---|
Related vulnerabilities
- CVE-2026-112901 Pillow is a Python imaging library. CWE-1333
- CVE-2026-106454 Twisted is an event-based framework for internet applications, supporting Python 3.6+. CWE-1333
- CVE-2026-77387 geopy is a geocoding library for Python. CWE-1333
- CVE-2026-102990 basic-ftp is an FTP client for Node.js. CWE-1333
- CVE-2026-102473 A flaw was found in dash. CWE-1333
- CVE-2026-102270 PyJWT is a Python implementation of JSON Web Token standards. CWE-1333
- CVE-2026-101906 Axios is a promise-based HTTP client for the browser and Node.js. CWE-1333
- CVE-2026-101903 Axios is a promise-based HTTP client for the browser and Node.js. CWE-1333