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Advisory record · GHSA-3982-jqvv-277m

Typed functions with `i31` or `nullref` arguments may panic due to insufficient type-check

CVSS 1.8 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
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-3982-jqvv-277m · RUSTSEC-2026-0422
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 flaw where typed functions taking i31 or nullref arguments may panic due to an insufficient type check. The source gives few details about how an attacker would trigger it or what else they could do. 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

ScoreRatingCVSSVectorSource
1.8 Low 3.1 CVSS:3.1/AV:A/AC:H/PR:H/UI:R/S:U/C:N/I:N/A:L 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.