CVE-2026-119137

CVSS 6.9 (medium) · published 2026-10-29

Wasmtime 42.0.0 before 48.0.6 and 49.0.0 before 49.0.3 contains a stack overflow vulnerability that allows guests to crash the host through recursive type drops. Guests can define a long chain of recursive types so that removing the top-level type triggers unbounded recursive drops, exhausting the host stack.

Weakness: CWE-674

Source: NVD CVE-2026-119137

References

• https://github.com/bytecodealliance/wasmtime/security/advisories/GHSA-wjc8-633q-pwxr
• https://www.vulncheck.com/advisories/wasmtime-42.0.0-before-48.0.6-and-49.0.0-before-49.0.3-stack-overflow-via-type-registry

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