CVE-2026-34971

HIGH7.8EPSS 0.02%

Miscompiled guest heap access enables sandbox escape on aarch64 Cranelift

Published: 4/9/2026Modified: 4/9/2026

Also known as:GHSA-jhxm-h53p-jm7wCGA-vmhf-4j8m-vmqxRUSTSEC-2026-0096

Description

This is an entry in the RustSec database for the Wasmtime security advisory located at https://github.com/bytecodealliance/wasmtime/security/advisories/GHSA-jhxm-h53p-jm7w For more information see the GitHub-hosted security advisory.

Affected packages (3)

crates.io/wasmtime>= 32.0.0, < 36.0.7
crates.io/wasmtime>= 0.0.0-0, < 36.0.7, >= 37.0.0, < 42.0.2, >= 43.0.0, < 43.0.1
Debian/rust-wasmtimefrom 0

CVSS scores

Source	Version	Severity	Vector
osv	CVSS 4.0	—	CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
osv	CVSS 3.1	HIGH7.8	CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H

References (6)

ADVISORYhttps://nvd.nist.gov/vuln/detail/CVE-2026-34971
ADVISORYhttps://security-tracker.debian.org/tracker/CVE-2026-34971
PATCHhttps://crates.io/crates/wasmtime
PATCHhttps://github.com/bytecodealliance/wasmtime
WEBhttps://github.com/bytecodealliance/wasmtime/security/advisories/GHSA-jhxm-h53p-jm7w
WEBhttps://rustsec.org/advisories/RUSTSEC-2026-0096.html