# CVE-2024-56141: Minosoft has IV equal to key

> Minosoft Minecraft client uses the encryption key as the initialization vector, allowing attackers to recover the secret key via chosen-plaintext attacks.

- **Severity:** Medium 5.0 (`CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 6 Jul 2026
- **Updated:** 8 Jul 2026
- **Also known as:** GHSA-rvr6-48rj-c94j

## What is CVE-2024-56141?

CVE-2024-56141 is a medium-severity vulnerability in Bixilon Minosoft, published on 6 Jul 2026. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

Minosoft is an open-source, multi-version Minecraft Java Edition client written in Kotlin. Starting in commit f1ae30e2b046a490026a8413b075685deb795122, the CryptManager  encryption routine ( CryptManager.kt ) initializes its AES cipher using an initialization vector (IV) that is set equal to the secret key rather than to a sufficiently random value. Because the IV is not random and is derived directly from the key, the encryption is vulnerable to chosen-ciphertext/chosen-plaintext attacks: an attacker who can submit specific messages for encryption can recover the secret key. This affects all versions supporting Minecraft protocol 1.7 and later. No patched version is available, and no known workarounds are available.

Weakness: CWE-329 (Generation of Predictable IV with CBC Mode)

## Which versions are affected by CVE-2024-56141?


## How do I fix CVE-2024-56141?

No fix has been published for CVE-2024-56141 yet. Limit exposure of the affected software until one is available.

## Is CVE-2024-56141 being exploited?

There is no known exploitation of CVE-2024-56141 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2024-56141 and fix it if it is affected.

What it is: CVE-2024-56141 is a medium-severity vulnerability in Bixilon Minosoft, published on 6 Jul 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2024-56141 in the wild and no public exploit code.

Affected product: Bixilon Minosoft. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2024-56141/ (Markdown: https://insights.sbomify.com/CVE-2024-56141/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2024-56141
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2024-56141
- OSV: https://osv.dev/vulnerability/CVE-2024-56141

---
From sbomify Insights: https://insights.sbomify.com/CVE-2024-56141/
Summaries are generated and may contain mistakes; the official description above is the record.