CVE-2026-115390

Medium

Description

Wasmtime 47.0.0 before 48.0.3 and 49.0.0 before 49.0.1 contains a fuel accounting flaw in Cranelift-compiled call_ref and try_table catch paths. Malicious guests can reset consumed fuel after calls to run exponentially long on linear fuel, evading timeouts and periodic yields for denial of service.

SeverityMedium

CVSS5.7

Exploit probability—

ProductBytecodealliance Wasmtime

PublishedOct 22, 2026

First seenOct 22, 2026

Weakness typeCWE-400Uncontrolled resource consumption

How to fix

Update

bytecodealliance wasmtime48.0.3, 49.0.1 or later

Vendor advisories

github.com/bytecodealliance/wasmtime/security/advisories/GHSA-m63x-6p34-q65x

Affected products

Product	Affected versions	Fixed in
bytecodealliance wasmtime	47.0.0 ≤ v < 48.0.3, 49.0.0 ≤ v < 49.0.1	48.0.3, 49.0.1

Check your version

Choose the product and enter the version you run to see whether it falls in the affected range.

In the Intelligence 360 plan

Attack Surface Management

See the assets tied to your domains, the technologies they run and known vulnerabilities in one list.