# joernio/joern

Open-source code analysis platform for C/C++/Java/Binary/Javascript/Python/Kotlin based on code property graphs. Discord https://discord.gg/vv4MH284Hc

Repository: https://github.com/joernio/joern
Canonical: https://ross.abutalabs.com/products/joern
Homepage: https://joern.io/
Language: Scala
License: Apache-2.0
License Family: permissive
Topics: code-analysis, query-language, code-browser, fuzzy-parsing, syntax-tree, dataflow, controlflow, cpg, java, cpp, code-property-graph, c, graph, llvm, javascript, javabytecode, binary, ghidra, scala
Last push: 2026-08-26T15:24:34+00:00

## Health v2 (maintenance only)
Score: 95/100 (v2, computed 2026-09-03T02:39:23.370411+00:00)
- activity 99, release rhythm 87, longevity 100
- inputs: {"age_days": 2729, "days_push": 7, "days_rel": 7, "gap_med": 0, "n_releases_24m": 508}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 3453, forks 443 (observed 2026-08-28T04:08:05.345659+00:00)

## What it is
Joern is an open-source code analysis platform that generates code property graphs (CPGs) from source code, bytecode, and binaries for C/C++, Java, JavaScript, Python, Kotlin, and more. It provides a Scala-based query language and interactive shell for mining code graphs, aimed at vulnerability discovery and static program analysis research.

## Use cases
- find security vulnerabilities in C/C++ codebases
- run taint analysis to trace attacker-controlled data
- analyze binaries and JVM bytecode without source
- write custom code scanners for CI pipelines
- query code structure across multiple languages with a DSL
- research static program analysis techniques

## When to choose
- you need cross-language static analysis with a graph-based code representation
- you are hunting for vulnerabilities or variants of known bug patterns
- you cannot build the target project and need robust fuzzy parsing
- you want to script custom code queries in Scala or integrate via REST API

## When to avoid
- you only need simple linting or formatting rather than deep code analysis
- you require a GUI-based code review tool
- your language is unsupported or has only low-maturity support
- you need a lightweight tool without JVM/Scala dependencies

## Facets
- artifact type: framework
- maturity: active
- function: security, parser, search-engine
- domain: security, developer-tools, programming-languages
- platform: cross-platform, cli, jvm
- tags: code-property-graph, static-analysis, vulnerability-discovery, taint-analysis, scala, code-scanning, ghidra, soot, static analysis, docker

## Member repositories
- joernio/joern (main) score 95

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:08:05.345659+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-29T18:37:32.956294+00:00, confidence not recorded.
  - readme: https://github.com/joernio/joern (fetched 2026-08-28T04:08:05.345659+00:00, sha 6404afa2e2f1)
  - homepage: https://joern.io/ (fetched 2026-08-29T09:31:12.576557+00:00, sha 786f45de9417)
  - site_page: https://docs.joern.io (fetched 2026-08-29T09:31:12.586087+00:00, sha 4d3cb17c8a47)
- Data as of 2026-08-30T08:39:29.467469+00:00.