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Advisory record · GHSA-7v24-42x9-pxf7

Panic on erroneous call-to-host from guest realloc call

CVSS 6.9 MediumEPSS 0.0037 · 31st percentile

Published by the GitHub Advisory Database at 14 Oct 2026, 12:00 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
wasmtimecrates.io>=46.0.0, <48.0.6 || >=49.0.0, <49.0.348.0.6, 49.0.3
Identifiers
GHSA-7v24-42x9-pxf7 · CVE-2026-119141 · RUSTSEC-2026-0356
Weakness (CWE)
CWE-1265
Tags
Published
14 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 crate versions from 46.0.0 before 48.0.6, and from 49.0.0 before 49.0.3, are affected by a panic triggered by an erroneous call from a guest to the host during a realloc call. The source gives few details beyond this, including what conditions are needed to trigger it. Upgrade to wasmtime 48.0.6 or 49.0.3, depending on the release line in use.

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
6.9 Medium 4.0 CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N CNA (VulnCheck)
  • CISA KEV Not listed.
  • EPSS 0.0037, the 31st percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

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.