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Advisory record · GHSA-3p27-qvp9-27qf

Leak in WASIp1 `fd_renumber` implementation

CVSS 2.3 LowEPSS 0.0037 · 31st percentile

Published by the maintainers · not yet reviewed by GitHub. The bytecodealliance/wasmtime maintainers published this as a GitHub repository advisory; GitHub’s reviewed advisory replaces it here when it arrives.

Published by the bytecodealliance/wasmtime maintainers at 15 Jun 2026, 12:00 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
wasmtime-wasicrates.io>=0.0.0-0, <24.0.10 || >=25.0.0, <36.0.11 || >=37.0.0, <44.0.3 || >=45.0.0, <45.0.224.0.10, 36.0.11, 44.0.3, 45.0.2
Identifiers
GHSA-3p27-qvp9-27qf · CVE-2026-54786 · RUSTSEC-2026-0182
Weakness (CWE)
CWE-400 · CWE-772
Tags
Published
15 Jun 2026
Updated
12 Oct 2026

Machine-written summary

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

The wasmtime-wasi crate, in versions before 24.0.10, 25.0.0 through 36.0.10, 37.0.0 through 44.0.2, and 45.0.0 through 45.0.1, has a leak in the WASIp1 fd_renumber implementation. The source gives few details on how the leak is triggered or what it exposes. Upgrade to 24.0.10, 36.0.11, 44.0.3, 45.0.2, or later in the matching 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
2.3 Low 4.0 CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:L CNA (GitHub_M)
  • CISA KEV Not listed.
  • EPSS 0.0037, the 31st percentile, on 15 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

  1. 15 Jun 2026, 17:14 UTC Published by the maintainers as a GitHub repository advisory
  2. 31 Oct 2026, 14:24 UTC First seen by agentprime
  3. 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.