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Advisory record · GHSA-hw8m-q44c-ggrf

Rooting for GC values live across `try_call` may be missing, causing GC heap corruption

CVSS 6.9 MediumEPSS 0.0028 · 20th percentile

Published by the GitHub Advisory Database at 2 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, <48.0.4 || >=49.0.0, <49.0.248.0.4, 49.0.2
Identifiers
GHSA-hw8m-q44c-ggrf · CVE-2026-115379 · RUSTSEC-2026-0326
Weakness (CWE)
CWE-416
Tags
Published
2 Oct 2026
Updated
24 Oct 2026

Machine-written summary

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

Wasmtime versions from 47.0.0 before 48.0.4 and from 49.0.0 before 49.0.2 are affected. The source gives few details beyond a GC rooting issue with values live across try_call that can corrupt the GC heap. Upgrade to Wasmtime 48.0.4 or 49.0.2.

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:L/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N CNA (VulnCheck)
  • CISA KEV Not listed.
  • EPSS 0.0028, the 20th percentile, on 7 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

  1. 22 Oct 2026, 19:13 UTC Confirmed by the CVE List
  2. 22 Oct 2026, 19:17 UTC Confirmed by NVD
  3. 31 Oct 2026, 14:24 UTC First seen by agentprime
  4. 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.