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CVE-2026-121439: bytecodealliance wasmtime: Wasmtime 46.0.0 before 48.0.7 and 49.0.0 before 49.0.4 contains a response splitting vulnerability in wasi-http p3 that…

🗓️ 03 Nov 2026 00:00:00Reported by Rapid7Type 
rapid7
 rapid7
🔗 www.rapid7.com👁 2 Views

Response splitting in wasmtime wasi-http p3 allows guests to set unvalidated headers.

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03 Nov 2026 00:00Current
6Medium risk
Vulners AI Score6
CVSS 3.15.3
CVSS 46.9
2