CRITICAL 9.4 NVD
CVE-2026-115384
Wasmtime 39.0.0 before 48.0.4 and 49.0.0 before 49.0.2 contains a stack buffer overflow vulnerability that allows malicious guests to write ~16KB to the native
Wasmtime 39.0.0 before 48.0.4 and 49.0.0 before 49.0.2 contains a stack buffer overflow vulnerability that allows malicious guests to write ~16KB to the native stack via unvalidated async callback result types. Attackers can supply components with mistyped component-model-async callback functions to overwrite return addresses, crashing the host or escaping the sandbox.
References
- https://github.com/bytecodealliance/wasmtime/security/advisories/GHSA-32h6-97mm-8q3c
- https://www.vulncheck.com/advisories/wasmtime-39.0.0-before-48.0.4-and-49.0.0-before-49.0.
This critical severity vulnerability with a CVSS score of 9.4 was published on 2026-10-22 via NVD.
Risk Timeline
CVE Disclosed2026-10-22 · -1 days ago
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