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Wasmtime with Winch compiler backend on aarch64 may allow a sandbox-escaping memory access

Wasmtime with Winch compiler backend on aarch64 may allow a sandbox-escaping memory access

CVE-2026-34987Published 5 months agoUpdated 5 days agoSource: OSV

Affected packages

  • wasmtime

Exploit signal

Known exploited (CISA KEV)
No
EPSS score
—
EPSS percentile
—

EPSS is the probability a CVE is exploited in the wild; percentile is its rank among all CVEs.

Sources

Structured record: https://osv.dev/vulnerability/GHSA-xx5w-cvp6-jv83

Recommended response stack

Snyk — Scan your dependencies in CI and fix this vulnerability.→

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Wasmtime with Winch compiler backend on aarch64 may allow a sandbox-escaping memory access | HackTribune