# RUSTSEC-2026-0458 - Memory exhaustion when parsing a crafted `iloc` box

Source: https://junglewise.ai/threats/rustsec-2026-0458-memory-exhaustion-when-parsing-a-crafted-iloc-box-ff60a271  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-11-04  
License: CC BY 4.0 with a link back

Severity: low · CVSS 3.1 · Published 2026-11-04

Memory exhaustion when parsing a crafted `iloc` box

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?** Low severity, with a CVSS score of 3.1, published 4 November 2026.

**Which products and versions are affected?** heifer-isobmff (crates.io) SEMVER:introduced=0.0.0-0,fixed=0.3.27.

**Is there a fix for This vulnerability?** Yes. heifer-isobmff (crates.io): upgrade to 0.3.27 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**Am I affected?** Check whether you run heifer-isobmff (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.

## How to fix

- heifer-isobmff (crates.io): upgrade to 0.3.27 or later

  ```sh
  cargo update -p heifer-isobmff
  ```


## Affected products

- heifer-isobmff (crates.io) SEMVER:introduced=0.0.0-0,fixed=0.3.27

## Identifiers

- GHSA-3243-948x-x627
- RUSTSEC-2026-0458