Allocation of Resources Without Limits or Throttling Affecting rust-wasmtime package, versions <36.0.6+dfsg-1


Severity

Recommended
0.0
high
0
10

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Threat Intelligence

EPSS
0.47% (37th percentile)

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  • Snyk IDSNYK-DEBIAN14-RUSTWASMTIME-15340908
  • published25 Feb 2026
  • disclosed24 Feb 2026

Introduced: 24 Feb 2026

CVE-2026-27572  (opens in a new tab)
CWE-770  (opens in a new tab)

How to fix?

Upgrade Debian:14 rust-wasmtime to version 36.0.6+dfsg-1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream rust-wasmtime package and not the rust-wasmtime package as distributed by Debian. See How to fix? for Debian:14 relevant fixed versions and status.

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. Embedders are encouraged to update to a patched version of Wasmtime.

CVSS Base Scores

version 3.1