CVEvulnerability
CVE-2026-77423
7.5 HIGH
Official page ↗
- Status
- Awaiting Analysis
- Published
- 2026-09-23
- Last modified
- 2026-09-30
- Assigner
- [email protected]
- CVSS 3.1 ([email protected])
- 7.5 HIGH — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- Weaknesses
- CWE-1333
Description
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.
Related
Weakness · CWE (1)
- CWE-1333 Inefficient Regular Expression Complexity weakness
References
- https://github.com/jline/jline3/commit/1d5fc3099e77938b971e197211cad2d4fbb17541 github.com
- https://github.com/jline/jline3/commit/341ee69ccc57b7733c1b40d6993219b64b3206ae github.com
- https://github.com/jline/jline3/pull/2012 github.com
- https://github.com/jline/jline3/pull/2018 github.com
- https://github.com/jline/jline3/releases/tag/4.3.1 github.com
- https://github.com/jline/jline3/releases/tag/jline-3.30.15 github.com
- https://github.com/jline/jline3/security/advisories/GHSA-2v9w-34q6-wpqx github.com
- https://github.com/jline/jline3/security/advisories/GHSA-2v9w-34q6-wpqx github.com