CVE-2026-119138

CVSS 5.9 (medium) · published 2026-10-29

Wasmtime 46.0.0 before 48.0.6 and 49.0.0 before 49.0.3 contains a denial of service vulnerability that allows pending calls to trigger an assertion failure after a trap poisons the Store. Attackers supplying misbehaving guest code can cause a trap and let earlier calls proceed, crashing embedders that continue using the inconsistent Store.

Weakness: CWE-617

Source: NVD CVE-2026-119138

References

• https://github.com/bytecodealliance/wasmtime/security/advisories/GHSA-hmwq-g22x-qjw5
• https://www.vulncheck.com/advisories/wasmtime-46.0.0-before-48.0.6-and-49.0.0-before-49.0.3-panic-after-trap

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