CVE-2026-115383 — Vulnerability intelligence

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Published: 2026-10-22T19:17:45.387

CVSS

5.9

CISA KEV

Not listed; not proof of no exploitation

Original source text (not a translation)

Wasmtime 47.0.0 before 48.0.4 and 49.0.0 before 49.0.2 contains an improper validation vulnerability that accepts components whose core modules import WebAssembly tags with a subtype of the original type. Malicious guests can mis-type exception object payloads to corrupt the GC heap, causing Wasmtime to panic when the exceptions proposal is enabled.

Sources

• CVE-2026-115383
• Original advisory
• Original advisory