CVE-2026-119141

MediumCVSS 5.3/10Last modified Oct 29, 2026

Description

Wasmtime 46.0.0 before 48.0.6 and 49.0.0 before 49.0.3 contains a denial of service vulnerability that allows malicious Wasm modules to panic the host because the may_leave flag is not cleared during realloc. Attackers can call into the host from realloc while lowering stream or future results, such as cancelling the active read or re-waiting a waitable-set, crashing the host.

Metrics

CVSS 3.1 5.3/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Weakness enumeration

CWE-1265

Affected software

Vendor	Product	Versions
bytecodealliance	wasmtime	>= 46.0.0, < 48.0.6; >= 49.0.0, < 49.0.3

References

Timeline

Published: Oct 29, 2026
Last modified: Oct 29, 2026
NVD status: Deferred

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