# RUSTSEC-2026-0262 - `append-only-vec` 0.1.9 was removed from crates.io due to a malicious dependency

Source: https://junglewise.ai/threats/rustsec-2026-0262-append-only-vec-0-1-9-was-removed-from-crates-io-due-eb5fad8a  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-08-20  
License: CC BY 4.0 with a link back

Severity: info · Published 2026-08-20

`append-only-vec` 0.1.9 was removed from crates.io due to a malicious dependency

Technologies: [append-only-vec (crates.io)](https://junglewise.ai/threats/technologies/append-only-vec). Vendors: [crates.io](https://junglewise.ai/threats/vendors/crates-io).

## Quick answers

**Is This vulnerability exploited in the wild?** No. Junglewise Threat Intelligence has no report of This vulnerability being exploited in the wild.

**How severe is This vulnerability?** Informational severity, published 20 August 2026.

**Which products and versions are affected?** append-only-vec (crates.io) SEMVER:introduced=0.1.9-0.

**Is there a fix for This vulnerability?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**Am I affected?** Check whether you run append-only-vec (crates.io) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Affected products

- append-only-vec (crates.io) SEMVER:introduced=0.1.9-0

## Related threats

- [arrayref crate malicious dependency code execution at build time](https://junglewise.ai/threats/cve-2026-77651-arrayref-crate-malicious-dependency-code-execution-at-build-time)
- [append-only-vec crate malicious build script supply chain attack](https://junglewise.ai/threats/cve-2026-77650-append-only-vec-crate-malicious-build-script-supply-chain-attack)