Fastly says Copy Fail does not affect Compute Wasm architecture
Fastly announced that its Compute platform, which uses a WebAssembly (Wasm)-based architecture, is not vulnerable to the recently identified 'Copy Fail' (CVE-2026-31431) security flaw. This vulnerability primarily affects shared Linux environments. Fastly highlights that its architectural approach inherently avoids the risks associated with this specific security issue.
Key Takeaways
- Copy Fail is tracked as CVE-2026-31431.
- Fastly Compute uses a WebAssembly (Wasm)-based architecture.
- The vulnerability primarily affects shared Linux environments.
- Fastly says its architecture avoids this specific security issue entirely.
Why It Matters
For Fastly Compute users, the immediate takeaway is that the platform is not exposed to Copy Fail, so this specific CVE does not require the same response as it does in shared Linux environments. The broader signal is architectural: Fastly is framing Wasm-based compute as structurally insulated from a class of host-level vulnerabilities that matter in shared infrastructure. The next concrete item to watch is whether Fastly publishes any follow-up guidance tied to CVE-2026-31431 or additional technical notes about Compute’s Wasm isolation model.
Read full article at fastly.com
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