Out-of-bounds write in wasm-micro-runtime - CVE-2026-54912
Published: August 5, 2026
Vulnerability identifier: #VU140983
CSH Severity: Medium
CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-54912
CWE-ID: CWE-787
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to out-of-bounds write in the fast interpreter loader in wasm_loader.c when loading a crafted WebAssembly module via wasm_runtime_load(). A remote attacker can supply a crafted WebAssembly module to cause a denial of service.
The issue occurs during module loading before any wasm code is executed, and the out-of-bounds write contains partially attacker-controlled data.
Affected software
wasm-micro-runtime
How to mitigate CVE-2026-54912
Install security update from vendor's website.
wasm-micro-runtime - update to 2.4.5