# MAL-2026-14333: Malicious code in append_only_vec (crates.io)


- **Type:** Malicious package
- **Package:** `append-only-vec` (crates.io)
- **Published:** 20 Aug 2026

## What is MAL-2026-14333?

MAL-2026-14333 is a malicious package in append-only-vec, published on 20 Aug 2026. 

### Official description

append-only-vec 0.1.9 was published to crates.io from the same maintainer account (droundy) as the trojanized arrayref and internment releases, which appears to be compromised. The release adds a dependency on an attacker-controlled crate whose build script downloads and executes an architecture-specific remote binary at build time from https://23.254.165.112:9089/, passing 23.254.165.112:443 as a command-and-control address. Part of a coordinated crates.io campaign on 2026-08-20. The malicious release has been removed from crates.io; earlier append-only-vec releases are unaffected.

## What should I do about MAL-2026-14333?

Remove the package from your dependencies and lockfiles, then rotate any secrets on machines where it was installed.

## Fix prompt for AI coding agents

```text
MAL-2026-14333 is a malicious package: append-only-vec (crates.io). Every version was published to cause harm.

Task:
1. Search this repository's dependency manifests and lockfiles for the package, including transitive dependencies.
2. If it is present, remove it, regenerate the lockfile with the project's package manager, and replace whatever it was used for.
3. List any CI runners, developer machines or containers that installed it, so their secrets can be rotated.
4. If the package is not used anywhere, say so and change nothing.

Reference: https://insights.sbomify.com/MAL-2026-14333/ (Markdown: https://insights.sbomify.com/MAL-2026-14333/index.md)
```

## Sources

- OSV: https://osv.dev/vulnerability/MAL-2026-14333

---
From sbomify Insights: https://insights.sbomify.com/MAL-2026-14333/
Summaries are generated and may contain mistakes; the official description above is the record.