What is GHSA-h5ch-mmp3-rm7x?

GHSA-h5ch-mmp3-rm7x is a security advisory published by GitHub Security Advisories with Low severity. Wasmtime 47.0.0 before 48.0.8, 49.0.0 before 49.0.5, and 50.0.0 before 50.0.1 contains an...

Which CVE IDs does GHSA-h5ch-mmp3-rm7x cover?

GHSA-h5ch-mmp3-rm7x covers the following CVE IDs: CVE-2026-126408. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of GHSA-h5ch-mmp3-rm7x?

GHSA-h5ch-mmp3-rm7x has a CVSS v3 base score of 1.8, published by GitHub Security Advisories.

GHSA-h5ch-mmp3-rm7xLowCVSS 1.8

Wasmtime 47.0.0 before 48.0.8, 49.0.0 before 49.0.5, and 50.0.0 before 50.0.1 contains an...

Vendor

GitHub Security Advisories

Published

November 13, 2026

Last Modified

November 13, 2026

🔗 CVE IDs covered (1)

CVE-2026-126408 →

📋 Description

Wasmtime 47.0.0 before 48.0.8, 49.0.0 before 49.0.5, and 50.0.0 before 50.0.1 contains an insufficient type-check in the TypedFunc embedder API for I31, Option, and Option parameter or result types, reaching an unreachable!() path. A malicious guest module exporting a function that uses another anyref-hierarchy type can panic the host embedding, causing denial of service.

🔗 References (4)

https://github.com/bytecodealliance/wasmtime/security/advisories/GHSA-3982-jqvv-277m
https://nvd.nist.gov/vuln/detail/CVE-2026-126408
https://www.vulncheck.com/advisories/wasmtime-47.0.0-before-48.0.8-denial-of-service-via-typedfunc-type-check-panic
https://github.com/advisories/GHSA-h5ch-mmp3-rm7x