DEBIAN-CVE-2026-77420
- Source
- https://security-tracker.debian.org/tracker/CVE-2026-77420
- Import Source
- https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2026-77420.json
- JSON Data
- https://api.test.osv.dev/v1/vulns/DEBIAN-CVE-2026-77420
- Upstream
- Published
- 2026-09-23T19:19:15Z
- Modified
- 2026-09-24T16:00:07Z
- Severity
-
- 5.5 (Medium) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
- Summary
- [none]
- Details
-
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.
- References
Affected packages
Debian:12 / jline3
Package
- Name
- jline3
- Purl
- pkg:deb/debian/jline3?arch=source&distro=bookworm
Debian:13 / jline3
Package
- Name
- jline3
- Purl
- pkg:deb/debian/jline3?arch=source&distro=trixie
Debian:14 / jline3
Package
- Name
- jline3
- Purl
- pkg:deb/debian/jline3?arch=source&distro=forky