CVE-2025-15411 WebAssembly CVE debrief

Who should care

Defenders responsible for WebAssembly wabt deployments, security teams, and operators of systems using affected versions should assess exposure and prioritize verification and potential patching. This includes reviewing the current version of WebAssembly wabt in use, understanding the potential impact of memory corruption, and planning for updates or mitigations. The public availability of the exploit and the potential for local host attacks increase the  

Why it matters

Defenders should prioritize verifying WebAssembly wabt versions, assessing exposure, and considering patches due to public exploit availability and potential local host attacks.

• Memory corruption could lead to local host attacks
• Exploit is publicly available and could be used for attacks
• Project has no active maintainer, potentially affecting fix availability

Technical summary

The vulnerability affects the function wabt::AST::InsertNode of the file /src/repro/wabt/bin/wasm-decompile of the component wasm-decompile, causing memory corruption due to improper handling of WebAssembly binary files. This issue allows attackers to potentially execute arbitrary code on the local host. The vulnerability is particularly concerning because the project has no active maintainer, which may delay the development of a patch. The exploit has been made public, increasing the risk of attacks. Defenders should prioritize verifying WebAssembly wabt versions, assessing exposure, and considering patches or fixes.

Defensive priority

Defenders should prioritize verifying the version of WebAssembly wabt in use and assessing exposure, as the exploit has been made public.

Recommended defensive actions

• Verify the version of WebAssembly wabt in use
• Assess exposure to the vulnerability
• Consider applying a patch or fix if available
• Review compensating controls for exposed systems
• Check relevant monitoring, detection, and logs for exposed assets
• Track exceptions and retest remediated assets
• Plan vendor-supported updates through normal change control

Evidence notes

The CVE record and NVD entry provide details on the vulnerability, including its description, CVSS score, and affected versions. The WebAssembly wabt project up to version 1.0.39 is affected, and the vulnerability causes memory corruption in the wasm-decompile component. Defenders should verify the version of WebAssembly wabt in use, assess exposure, and consider patches or fixes. The project currently lacks an active maintainer, which may impact the availability of a fix. The exploit has been made public, increasing the urgency for  

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.