Is wasmtime affected by CVE-2026-34945?

crates.io wasmtime is affected in >=25.0.0 =37.0.0 =43.0.0 <43.0.1.

Is CVE-2026-34945 being exploited?

Not on the CISA KEV list. EPSS exploit probability is 0.3%.

low

CVE-2026-34945

Q: Is CVE-2026-34945 being exploited?

Not on the CISA KEV list. EPSS exploit probability is 0.3%.

crates.io · wasmtime

Summary

Wasmtime has host data leakage with 64-bit tables and Winch

Severity: low
EPSS: 0.3% (p24)
Also known as: GHSA-m9w2-8782-2946, RUSTSEC-2026-0086
Published: 2026-04-09

References

https://github.com/bytecodealliance/wasmtime/security/advisories/GHSA-m9w2-8782-2946
https://nvd.nist.gov/vuln/detail/CVE-2026-34945
https://github.com/bytecodealliance/wasmtime

Related advisories

CVE-2026-34987 — critical · crates.io/wasmtime
CVE-2026-34971 — critical · crates.io/wasmtime
CVE-2023-26489 — critical · crates.io/wasmtime
CVE-2022-39393 — high · crates.io/wasmtime
CVE-2022-24791 — high · crates.io/wasmtime
CVE-2026-44216 — medium · crates.io/wasmtime
CVE-2026-35186 — medium · crates.io/wasmtime
CVE-2026-35195 — medium · crates.io/wasmtime

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Sources: CISA KEV (public domain), OSV.dev & GitHub Advisory Database (CC-BY-4.0), FIRST EPSS, NVD/CWE (public domain). Served live from the Stateward advisory database.