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Advisory record · GHSA-qw58-7h65-crq2

Cross-engine type confusion with host-created struct-types-with-supertypes

No CVSS score

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
wasmtimecrates.io>=47.0.0, <48.0.8 || >=49.0.0, <49.0.5 || >=50.0.0, <50.0.148.0.8, 49.0.5, 50.0.1
Identifiers
GHSA-qw58-7h65-crq2 · RUSTSEC-2026-0423
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.

Wasmtime versions 47.0.0 up to 48.0.8, 49.0.0 up to 49.0.5, and 50.0.0 up to 50.0.1 are affected by a cross-engine type confusion issue involving host-created struct types with supertypes. The source gives few details about how an attacker would trigger it or what they could gain. Upgrade to Wasmtime 48.0.8, 49.0.5, or 50.0.1, depending on your release 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

No source has published a CVSS score for this record yet.

  • 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.