CVE-2026-119141

5.3 MEDIUMpublic exploit available

Published 2026-10-29 · Updated 2026-10-29

AI analysis for this CVE has not been generated yet. Raw NVD data is shown below.

NVD 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.

CVSS vector

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

Weaknesses

CWE-1265

Public exploit & PoC references

https://github.com/bytecodealliance/wasmtime/security/advisories/GHSA-7v24-42x9-pxf7

All references

https://github.com/bytecodealliance/wasmtime/security/advisories/GHSA-7v24-42x9-pxf7
https://www.vulncheck.com/advisories/wasmtime-46.0.0-before-48.0.6-and-49.0.0-before-49.0.3-host-panic-via-realloc

Source data: NVD (nvd.nist.gov), public domain. Exploit-DB.ai adds local AI analysis for defensive use only.

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MEDIUMCVE-2026-119136PoC

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