crates.io/wasmtime CVE-2026-27204: medium 6.5, EPSS 0.40%

Wasmtime WASI implementations are vulnerable to guest-controlled resource exhaustion

Action: Upgrade wasmtime to 24.0.6 or later.

cargo update -p wasmtime --precise 24.0.6

cargo update -p wasmtime --precise 36.0.6

cargo update -p wasmtime --precise 40.0.4

Affected

Fixed versions

Sources

• osv: GHSA-852m-cvvp-9p4w
• nvd: CVE-2026-27204
• https://github.com/bytecodealliance/wasmtime/security/advisories/GHSA-852m-cvvp-9p4w
• https://github.com/bytecodealliance/wasmtime/issues/11552
• https://github.com/bytecodealliance/wasmtime/pull/12599
• https://docs.rs/wasmtime-wasi/latest/wasmtime_wasi/struct.WasiCtxBuilder.html#method.max_random_size
• https://docs.rs/wasmtime/latest/wasmtime/component/struct.ResourceTable.html#method.set_max_capacity
• https://docs.rs/wasmtime/latest/wasmtime/struct.Store.html#method.set_hostcall_fuel
• https://docs.wasmtime.dev/security-what-is-considered-a-security-vulnerability.html
• https://github.com/bytecodealliance/wasmtime
• https://rustsec.org/advisories/RUSTSEC-2026-0020.html

CVE-2026-27204 · published 2026-02-24T20:47:08Z · modified 2026-09-10T03:50:34.409495188Z · JSON