CVE-2026-34983
MEDIUM5.0EPSS 0.01%Use-after-free bug after cloning `wasmtime::Linker`
Published: 4/9/2026Modified: 5/20/2026
Also known as:GHSA-hfr4-7c6c-48w2CGA-4cqx-28v6-cpr4DEBIAN-CVE-2026-34983PYSEC-2026-151RUSTSEC-2026-0090
Description
This is an entry in the RustSec database for the Wasmtime security advisory located at https://github.com/bytecodealliance/wasmtime/security/advisories/GHSA-hfr4-7c6c-48w2 For more information see the GitHub-hosted security advisory.
Affected packages (4)
- crates.io/wasmtime>= 43.0.0, < 43.0.1
- crates.io/wasmtime>= 43.0.0, < 43.0.1
- Debian/rust-wasmtimefrom 0
- PyPI/wasmtimefrom 0, <= 43.0.0
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 4.0 | — | CVSS:4.0/AV:P/AC:H/AT:P/PR:H/UI:A/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N |
| osv | CVSS 3.1 | MEDIUM5.0 | CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:H |
References (6)
- ADVISORYhttps://github.com/bytecodealliance/wasmtime/security/advisories/GHSA-hfr4-7c6c-48w2
- ADVISORYhttps://nvd.nist.gov/vuln/detail/CVE-2026-34983
- ADVISORYhttps://security-tracker.debian.org/tracker/CVE-2026-34983
- PATCHhttps://crates.io/crates/wasmtime
- PATCHhttps://github.com/bytecodealliance/wasmtime
- WEBhttps://rustsec.org/advisories/RUSTSEC-2026-0090.html