# RUSTSEC-2026-0207 - Incorrect Output of Incremental Portable SHAKE API on Multiple Squeeze Calls

Source: https://junglewise.ai/threats/rustsec-2026-0207-incorrect-output-of-incremental-portable-shake-api-on-a609d84d  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-04-22  
License: CC BY 4.0 with a link back

Severity: medium · CVSS 4 · Published 2026-04-22

Incorrect Output of Incremental Portable SHAKE API on Multiple Squeeze Calls

Technologies: [libcrux-sha3 (crates.io)](https://junglewise.ai/threats/technologies/libcrux-sha3). 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?** Medium severity, with a CVSS score of 4, published 22 April 2026.

**Which products and versions are affected?** libcrux-sha3 (crates.io) SEMVER:introduced=0.0.0-0,fixed=0.0.10.

**Is there a fix for This vulnerability?** Yes. libcrux-sha3 (crates.io): upgrade to 0.0.10 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 libcrux-sha3 (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

- libcrux-sha3 (crates.io): upgrade to 0.0.10 or later

  ```sh
  cargo update -p libcrux-sha3
  ```


## Affected products

- libcrux-sha3 (crates.io) SEMVER:introduced=0.0.0-0,fixed=0.0.10

## Related threats

- [RUSTSEC-2026-0208 - Potential Panic in AVX2 SHAKE-256](https://junglewise.ai/threats/rustsec-2026-0208-potential-panic-in-avx2-shake-256-cbf22935)
- [libcrux-sha3: Incorrect output from SHAKE squeeze functions](https://junglewise.ai/threats/libcrux-sha3-incorrect-output-from-shake-squeeze-functions-a2cf1208)
- [RUSTSEC-2026-0074 - Incorrect Output of Incremental Portable SHAKE API](https://junglewise.ai/threats/rustsec-2026-0074-incorrect-output-of-incremental-portable-shake-api-5ae10b90)