# CVE-2024-30266: RUSTSEC-2024-0441 - Panic when using a dropped extenref-typed element segment

Source: https://junglewise.ai/threats/cve-2024-30266-pysec-2024-327-wasmtime-is-a-runtime-for-webassembly-the-19-0-0  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2024-04-02  
License: CC BY 4.0 with a link back

CVE-2024-30266 · Severity: low · CVSS 3.1 · Published 2024-04-02

Panic when using a dropped extenref-typed element segment

Technologies: [wasmtime (crates.io)](https://junglewise.ai/threats/technologies/wasmtime), [wasmtime (PyPI)](https://junglewise.ai/threats/technologies/pypi-wasmtime). Vendors: [crates.io](https://junglewise.ai/threats/vendors/crates-io), [PyPI](https://junglewise.ai/threats/vendors/pypi).

## Quick answers

**Is CVE-2024-30266 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2024-30266 being exploited in the wild.

**How severe is CVE-2024-30266?** Low severity, with a CVSS score of 3.1, published 2 April 2024.

**Which products and versions are affected?** wasmtime (crates.io) SEMVER:introduced=19.0.0,fixed=19.0.1; wasmtime (PyPI) ECOSYSTEM:introduced=0,last_affected=19.0.0.

**Is there a fix for CVE-2024-30266?** Yes. wasmtime (crates.io): upgrade to 19.0.1 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**Am I affected by CVE-2024-30266?** Check whether you run wasmtime (crates.io) or wasmtime (PyPI) 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.

## How to fix

- wasmtime (crates.io): upgrade to 19.0.1 or later

  ```sh
  cargo update -p wasmtime
  ```


## Affected products

- wasmtime (crates.io) SEMVER:introduced=19.0.0,fixed=19.0.1
- wasmtime (PyPI) ECOSYSTEM:introduced=0,last_affected=19.0.0

## Identifiers

- CVE-2024-30266
- GHSA-75hq-h6g9-h4q5
- PYSEC-2024-327
- RUSTSEC-2024-0441

## Related threats

- [RUSTSEC-2026-0422 - Typed functions with `i31` or `nullref` arguments may panic due to insufficient type-check](https://junglewise.ai/threats/rustsec-2026-0422-typed-functions-with-i31-or-nullref-arguments-may-0545dc2b)
- [Wasmtime type confusion with host-created struct types](https://junglewise.ai/threats/rustsec-2026-0423-cross-engine-type-confusion-with-host-created-struct-89fe3f0e)
- [Wasmtime unchecked memory usage in borrowed resource transfer](https://junglewise.ai/threats/rustsec-2026-0424-unchecked-memory-usage-in-transferring-borrowed-b297503c)
- [Wasmtime Cranelift aarch64 br_table sandbox escape](https://junglewise.ai/threats/cve-2026-115893-wasmtime-is-a-runtime-for-webassembly-prior-to-36-0-19-48-0-7)
- [Wasmtime component-model type-check bypass in stream/future lowering](https://junglewise.ai/threats/cve-2026-115892-wasmtime-is-a-runtime-for-webassembly-from-46-0-0-until-48-0-7)