CVE-2026-115383

Name	CVE-2026-115383
Description	Wasmtime 47.0.0 before 48.0.4 and 49.0.0 before 49.0.2 contains an improper validation vulnerability that accepts components whose core modules import WebAssembly tags with a subtype of the original type. Malicious guests can mis-type exception object payloads to corrupt the GC heap, causing Wasmtime to panic when the exceptions proposal is enabled.
Source	CVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
rust-wasmtime (PTS)	trixie	26.0.1+dfsg-3	fixed
	forky, sid	36.0.13+dfsg-1	fixed

The information below is based on the following data on fixed versions.

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
rust-wasmtime	source	(unstable)	(not affected)

Notes

- rust-wasmtime <not-affected> (Only affects 47 and later)
https://github.com/bytecodealliance/wasmtime/security/advisories/GHSA-cfhf-m2cr-62wj
https://rustsec.org/advisories/RUSTSEC-2026-0325.html