CVE-2026-115379

Medium

Description

Wasmtime 47.0.0 before 48.0.4 and 49.0.0 before 49.0.2 contains a missing GC rooting vulnerability that leaves references live across try_call unrooted when compiling Wasm modules. Attackers can supply Wasm modules whose callee triggers garbage collection, leaving stale or dangling references that cause GC heap corruption or incorrect execution.

SeverityMedium

CVSS5.7

Exploit probability—

Product

Microsoft Azl3 Rust

PublishedOct 22, 2026

First seenOct 22, 2026

Weakness typeCWE-416Use after free

How to fix

Vendor advisories

github.com/bytecodealliance/wasmtime/security/advisories/GHSA-hw8m-q44c-ggrf

Affected products

Product	Affected versions	Fixed in
microsoft azl3_rust_1.98.1-1	No range specified	—
microsoft azl3_rust_1.96.1-2	No range specified	—

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