Use After Free Affecting wasmi package, versions >=0.41.0 <0.41.2>=0.42.0 <0.47.1>=0.50.0 <0.51.3>=1.0.0 <1.0.1
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-RUST-WASMI-14236590
- published10 Dec 2025
- disclosed8 Dec 2025
- creditRobert T. Morris
Introduced: 8 Dec 2025
NewCVE-2025-66627 (opens in a new tab)How to fix?
Upgrade wasmi to version 0.41.2, 0.47.1, 0.51.3, 1.0.1 or higher.
Overview
wasmi is a WebAssembly interpreter.
Affected versions of this package are vulnerable to Use After Free in the linear memory implementation. An attacker can achieve memory corruption, read sensitive information, or execute arbitrary code by triggering specific memory growth conditions in a WebAssembly module.