CVE-2025-6273: Webassembly Wabt

Low severity, CVSS 3.3. EPSS: 0.2% chance of exploitation in the next 30 days.

A vulnerability was found in WebAssembly wabt up to 1.0.37 and classified as problematic. This issue affects the function LogOpcode of the file src/binary-reader-objdump.cc. The manipulation leads to reachable assertion. Local access is required to approach this attack. The exploit has been disclosed to the public and may be used. The real existence of this vulnerability is still doubted at the moment. The code maintainer explains that this issue might not affect "real world wasm programs".

Affected products

• Webassembly Wabt: up to and including 1.0.37

Published 2025-06-19. Last modified 2026-06-17.