Vulnerability in Bytecodealliance Wasmtime
CVE-2026-27195
Wasmtime is a runtime for WebAssembly. Starting with Wasmtime 39.0.0, the `component-model-async` feature became the default, which brought with it a new implementation of `[Typed]Func::call_async` which made it capable of calling async-ty…
EPSS: 0.004 (28.6th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
Affected products
- Bytecodealliance Wasmtime — versions >= 39.0.0, < 40.0.4, >= 41.0.0, < 41.0.4
Weakness classification (CWE)
References
- security-advisories@github.com (x_refsource_CONFIRM, Third Party Advisory)
- security-advisories@github.com (Patch, x_refsource_MISC)
- security-advisories@github.com (Patch, x_refsource_MISC)
- security-advisories@github.com (Product, x_refsource_MISC)
- security-advisories@github.com (Product, x_refsource_MISC, Release Notes)
- security-advisories@github.com (Product, x_refsource_MISC, Release Notes)
Frequently asked questions
- What is CVE-2026-27195?
- CVE-2026-27195 is a high-severity vulnerability in Bytecodealliance Wasmtime, classified under Improper Handling of Exceptional Conditions. CVSS score: 7.5/10. Published 2026-02-24.
- How severe is CVE-2026-27195?
- High severity. CVSS v3 base score is 7.5 out of 10.