{"schemaVersion":3,"id":"CVE-2026-27572","aliases":["UBUNTU-CVE-2026-27572","DEBIAN-CVE-2026-27572","CGA-5c9m-m45c-2j2g","CGA-76gq-3pm8-2x9r","CGA-795p-3x46-v986","CGA-9cqh-8ff8-3j39","CGA-f4v7-8jmc-qc4f","CGA-m6x5-xgc7-h227","CGA-mjm3-6w43-cwj6","CGA-p67q-f83x-fvff","CGA-pvx7-hmp6-884g","CGA-pwc6-43xc-r5v4","CGA-vffm-35g2-cfcr","CGA-xrf6-w3w2-44fx","GHSA-243v-98vx-264h","RUSTSEC-2026-0021"],"status":"published","duplicateOf":null,"title":null,"description":"Wasmtime is a runtime for WebAssembly. Prior to versions 24.0.6, 36.0.6, 4.0.04, 41.0.4, and 42.0.0, Wasmtime's implementation of the `wasi:http/types.fields` resource is susceptible to panics when too many fields are added to the set of headers. Wasmtime's implementation in the `wasmtime-wasi-http` crate is backed by a data structure which panics when it reaches excessive capacity and this condition was not handled gracefully in Wasmtime. Panicking in a WASI implementation is a Denial of Service vector for embedders and is treated as a security vulnerability in Wasmtime. Wasmtime 24.0.6, 36.0.6, 40.0.4, 41.0.4, and 42.0.0 patch this vulnerability and return a trap to the guest instead of panicking. There are no known workarounds at this time. 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