Answer in brief
CVE-2026-77422 records a High severity (CVSS 7.5) vulnerability in JLine: ReDoS in Built-in grep Command Amplified by Automatic `.*` Wrapping. The current sources do not mark it as known exploited. The current feed maps jline/jline3 (generic), org.jline:jline-builtins (maven), org.jline:jline-builtins (maven), org.jline:jline-builtins (maven) and additional mapped packages. Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 7.5. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps jline/jline3 (generic), org.jline:jline-builtins (maven), org.jline:jline-builtins (maven), org.jline:jline-builtins (maven) and additional mapped packages. Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| jline/jline3generic | >=3.0.0 <3.30.15 || >=4.0.0 <4.3.1 | 3.30.15, 4.3.1 |
| org.jline:jline-builtinsmaven | >=3.0.0 <3.30.15 | 3.30.15 |
| org.jline:jline-builtinsmaven | >=4.0.0,<4.3.1 | 4.3.1 |
| org.jline:jline-builtinsmaven | >=3.0.0,<3.30.15 | 3.30.15 |
| org.jline:jline-builtinsmaven | >=4.0.0 <4.3.1 | 4.3.1 |
Published upstream
Sep 23, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Sep 23, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Sep 23, 2026
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 grep command in builtins/src/main/java/org/jline/builtins/PosixCommands.java accepts a user-controlled regular expression in grep(...) and, unless line-regexp mode is used, automatically adds a dot-star prefix and suffix before compiling it with Java's backtracking regular expression engine. The wrapping expands the backtracking search space, so a short nested-quantifier expression evaluated against non-matching input can consume excessive CPU and indefinitely block a command worker, including in remotely exposed shell sessions. This issue is fixed in versions 3.30.15 and 4.3.1.
Quoted source text, attributed separately from HOL analysis.