CVE-2026-121441
LOW
NVD
CVSS Score
3.7
Severity
LOW
Published
Nov 03, 2026
Vendor
unknown
Description
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.