Reachable assertion in Wasmtime - CVE-2025-62711
Published: October 28, 2025
Vulnerability identifier: #VU117688
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2025-62711
CWE-ID: CWE-617
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Bytecode Alliance
Affected software:
Wasmtime
Wasmtime
Detailed vulnerability description
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to a reachable assertion within implementation of component-model related host-to-wasm trampolines. A remote user can create a specially crafted component that will cause the host to crash once called by the application.
How to mitigate CVE-2025-62711
Install updates from vendor's website.