GHSA-4h67-722j-5pmc: wasmtime (CVE-2025-62711)

Possible host crash with host-to-wasm component intrinsics

CVSS 2.1 LowEPSS 0.0041 · 35th percentile

Published by the GitHub Advisory Database at 18 Jul 2025, 12:00 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

Package	Ecosystem	Affected	Fixed in
wasmtime	crates.io	>=38.0.0, <38.0.3	38.0.3

Identifiers

GHSA-4h67-722j-5pmc · CVE-2025-62711 · RUSTSEC-2025-0112

Weakness (CWE)

CWE-755

Machine-written summary

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

The Wasmtime package, versions 38.0.0 up to but not including 38.0.3, is affected. The source gives few details about the attack conditions or impact beyond a possible host crash involving host-to-wasm component intrinsics. Upgrade to Wasmtime 38.0.3 or later.

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

Score	Rating	CVSS	Vector	Source
2.1	Low	4.0	CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:L	CNA (GitHub_M)

CISA KEV Not listed.
EPSS 0.0041, the 35th percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

31 Oct 2026, 14:24 UTC First seen by agentprime
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.