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Advisory record · GHSA-h4wp-g4x3-7398

wasi-http p2: outgoing content-length can be invalid or not match body

CVSS 3.7 Low

Published by the GitHub Advisory Database at 29 Oct 2026, 12:00 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
wasmtime-wasi-httpcrates.io>=0.0.0-0, <36.0.20 || >=37.0.0, <48.0.8 || >=49.0.0, <49.0.5 || >=50.0.0, <50.0.136.0.20, 48.0.8, 49.0.5, 50.0.1
Identifiers
GHSA-h4wp-g4x3-7398 · RUSTSEC-2026-0421
Published
29 Oct 2026
Updated
30 Oct 2026

Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

The wasmtime-wasi-http crate is affected in versions before 36.0.20, from 37.0.0 before 48.0.8, from 49.0.0 before 49.0.5, and from 50.0.0 before 50.0.1. The source gives few details: it describes an issue where the outgoing content-length header can be invalid or not match the body, but does not describe the attacker's requirements or impact. Upgrade to 36.0.20, 48.0.8, 49.0.5, 50.0.1, or a later version in the same line.

Written 3 Nov 2026.

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

ScoreRatingCVSSVectorSource
3.7 Low 3.1 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N OSV
  • CISA KEV Not listed.
  • EPSS No score.

Timeline

  1. 31 Oct 2026, 14:24 UTC First seen by agentprime
  2. 31 Oct 2026, 14:24 UTC Confirmed by OSV

Sources

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.