# mbechler/marshalsec

Repository: https://github.com/mbechler/marshalsec
Canonical: https://ross.abutalabs.com/products/marshalsec
Language: Java
License: MIT
License Family: permissive
Last push: 2025-01-09T19:07:14+00:00

## Health v2 (maintenance only)
Score: 32/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 0, release rhythm 35, longevity 100
- inputs: {"age_days": 3390, "days_push": 601, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: no_releases
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 3708, forks 677 (observed 2026-08-28T04:08:15.146361+00:00)

## What it is
marshalsec is a Java tool and research project that generates exploitation payloads for insecure unmarshalling across many Java marshalling libraries (XStream, Jackson, SnakeYAML, Kryo, Hessian, etc.). It demonstrates how deserialization of attacker-supplied data can lead to remote code execution.

## Use cases
- generate deserialization exploit payloads for Java marshallers
- test whether my Java app is vulnerable to unsafe unmarshalling
- research Java deserialization RCE gadgets
- demonstrate JNDI injection / Log4Shell exploitation vectors
- audit third-party marshalling libraries for RCE risks

## When to choose
- you are doing security testing or research on Java deserialization vulnerabilities
- you need payload generators for a wide range of Java marshalling frameworks
- you want to verify whether your own systems are exposed to unmarshalling RCE

## When to avoid
- you need a general-purpose serialization library for production use
- you want an automated vulnerability scanner rather than a targeted exploitation tool
- your project is not on the Java/JVM platform

## Facets
- artifact type: cli-tool
- maturity: maintenance
- function: security, penetration-testing, serialization, testing
- domain: security, penetration-testing, developer-tools
- platform: jvm, cli, cross-platform
- tags: java-deserialization, jndi-injection, exploitation, payload-generation, vulnerability-research, log4shell

## Member repositories
- mbechler/marshalsec (main) score 32

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:08:15.146361+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 2026-08-29T18:30:57.548274+00:00, confidence not recorded.
  - readme: https://github.com/mbechler/marshalsec (fetched 2026-08-28T04:08:15.146361+00:00, sha 9b50fff39cf9)
- Data as of 2026-08-30T08:39:29.467469+00:00.