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CVE-2026-77420

JLine: ReDoS via `HISTORY_IGNORE` Configuration Variable PUBLISHED

Description (CNA)

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.

Affected (CNA)

Vendor / productVersions
jline / jline3affected >= 3.0.0, < 3.30.15; affected >= 4.0.0, < 4.3.1

CWE

CWE-1333

References

ADP enrichment

CISA-ADP

No English description supplied.