MEDIUM 6.3 NVD
CVE-2026-121441
Wasmtime before 36.0.19, 37.0.0 before 48.0.7, and 49.0.0 before 49.0.4 contains a request smuggling vulnerability in wasi-http that allows guests to set multip
Wasmtime before 36.0.19, 37.0.0 before 48.0.7, and 49.0.0 before 49.0.4 contains a request smuggling vulnerability in wasi-http that allows guests to set multiple conflicting content-length headers. Malicious guests can make the host send HTTP requests with conflicting content-length values to smuggle requests through servers or intermediaries that do not reject them.
References
- https://github.com/bytecodealliance/wasmtime/security/advisories/GHSA-r8xh-cgf7-392j
- https://www.vulncheck.com/advisories/wasmtime-before-36.0.19-37.0.0-before-48.0.7-and-49.0
This medium severity vulnerability with a CVSS score of 6.3 was published on 2026-11-03 via NVD.
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