VULNRABLE / Vulnerability / CVE-2026-115889

CVE-2026-115889

CRITICAL WATCH wasmtime GHSA

Exploit verdict: CVSS 9.5 · critical severity

CVSS Score

9.5

Severity

CRITICAL

EPSS

Source

GHSA

Summary

Wasmtime: Bit-packing in Cranelift compiler causes silent overflow and miscompilation

What this means

CVE-2026-115889 is a critical-severity vulnerability affecting wasmtime, rated CVSS 9.5. The EPSS model estimates a 0% probability of exploitation in the next 30 days. Published October 23, 2026.

View full advisory at GHSA →