Bug 2559268 (CVE-2026-115382)

Summary: CVE-2026-115382 wasmtime: wasmtime: Denial of Service via zero timeout in HTTP request option
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: rhel-process-autobot, watson-tool-maintainers
Target Milestone: ---Keywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in Wasmtime. A guest WebAssembly application can trigger a Denial of Service (DoS) by specifying a zero timeout value in an HTTP request option. Because the runtime fails to validate this configuration before passing it to an underlying system library, an internal panic occurs that crashes the host process.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Description OSIDB Bzimport 2026-10-22 19:53:52 UTC
Wasmtime 46.0.0 before 48.0.4 and 49.0.0 before 49.0.2 contains a denial-of-service vulnerability in its wasi:http implementation that allows guests to panic the host. Guests can specify a zero between-bytes-timeout request option, which is forwarded directly to a Tokio API that panics, crashing the host embedding.