---
id: RUSTSEC-2026-0376
aliases:
  - GHSA-r8xh-cgf7-392j
title: '`wasi-http`: Guests can add conflicting content lengths to messages'
summary: '`wasi-http`: Guests can add conflicting content lengths to messages'
severity: low
cvss: 3.7
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N'
vendor: wasmtime-wasi-http
product: wasmtime-wasi-http
ecosystem: rust
affected:
  - 'wasmtime-wasi-http >= 49.0.0, < 49.0.4'
patched:
  - wasmtime-wasi-http 49.0.4
published: '2026-10-19'
updated: '2026-10-20'
sourceUpdated: '2026-10-20T11:15:37.074781119Z'
source: OSV
sourceUrl: 'https://osv.dev/vulnerability/RUSTSEC-2026-0376'
references:
  - url: 'https://crates.io/crates/wasmtime-wasi-http'
  - url: 'https://rustsec.org/advisories/RUSTSEC-2026-0376.html'
  - url: 'https://github.com/bytecodealliance/wasmtime/pull/14824'
tags:
  - osv
  - rust
ingestedAt: '2026-10-21T11:54:42.769Z'
---

## Overview

This is an entry in the RustSec database for the Wasmtime security advisory
located at
https://github.com/bytecodealliance/wasmtime/security/advisories/GHSA-r8xh-cgf7-392j
For more information see the GitHub-hosted security advisory.

## Affected packages

- `wasmtime-wasi-http >= 49.0.0, < 49.0.4`

## Remediation

Upgrade to a patched release:

- `wasmtime-wasi-http 49.0.4`