CVE-2026-34987None▾ SunlitWasmtime with Winch compiler backend may allow a sandbox-escaping memory access
▾ Sunlit zone — Low / medium · no exploitation signal
impact 2.8 · likelihood 0.1 · exploitation 0
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Exploit-prediction probability, daily snapshots since Oct 13.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via OSV
Last analysed / modified upstream
0.5%
This is an entry in the RustSec database for the Wasmtime security advisory located at https://github.com/bytecodealliance/wasmtime/security/advisories/GHSA-xx5w-cvp6-jv83 For more information see the GitHub-hosted security advisory.
wasmtime >= 43.0.0, < 43.0.1Upgrade to a patched release:
wasmtime 43.0.1Connected by shared product, vendor, weakness, or advisory.
CVE-2026-35186NoneImproperly masked return value from `table.grow` with Winch compiler backend
RUSTSEC-2026-0424NoneUnchecked memory usage in transferring borrowed resources between components
RUSTSEC-2026-0423NoneCross-engine type confusion with host-created struct-types-with-supertypes
RUSTSEC-2026-0422Low· 1.8Typed functions with `i31` or `nullref` arguments may panic due to insufficient type-check
CVE-2026-119133NoneException tags can cause host data structures to be unaligned
CVE-2026-119134Medium· 6.2Component-model handle tables are capped only per instance and charged to no limit