CVE-2026-115383
CVE-2026-115383 · Wasmtime 47.0.0 before 48.0.4 and 49.0.0 before 49.0.2 GC Heap Corruption via Tag Imports
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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.
CVSS 5.9 · Medium · EPSS 0.2% · Fix available
- Published
- Updated
Affected products and versions
wasmtime
- Versions
- ≥ 47.0.0, < 48.0.4: Affected (semver)
- 48.0.4: Not affected (semver)
- ≥ 49.0.0, < 49.0.2: Affected (semver)
- 49.0.2: Not affected (semver)
Update to 48.0.4; Update to 49.0.2