Connect your agent
AdvisoriesCriticalCheck your lockfilePluginHow it worksPricing Connect your agent

Advisory record · GHSA-m63x-6p34-q65x

`call_ref` and exception `catch` can drop some fuel accounting, leading to exponential fuel amplification

CVSS 6.9 MediumEPSS 0.0024 · 15th percentile

Published by the GitHub Advisory Database at 24 Sept 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, <48.0.3 || >=49.0.0, <49.0.148.0.3, 49.0.1
Identifiers
GHSA-m63x-6p34-q65x · CVE-2026-115390 · RUSTSEC-2026-0315
Weakness (CWE)
CWE-400
Tags
Published
24 Sept 2026
Updated
24 Oct 2026

Machine-written summary

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

Wasmtime versions 47.0.0 to before 48.0.3 and 49.0.0 to before 49.0.1 are affected. Some fuel accounting is dropped when executing call_ref and exception catch, which can lead to exponential fuel amplification. The source gives few details about the attack conditions. Upgrade to Wasmtime 48.0.3 or 49.0.1.

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 0.0024, the 15th percentile, on 7 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.