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Wasmtime has a Heap OOB read in component model UTF-16 to latin1+utf16 string transcoding

Collected exploitation and prediction evidence

Risk source coverage

CISA KEV is observed exploitation evidence. FIRST EPSS is a dated prediction of exploitation in the next 30 days. Missing scores are unknown. This collector requests predictions only for explicit CVE aliases in the public NuGet archive; Microsoft release views retain their existing prediction scope.

No collected risk observation for these identifiers. This does not establish absence of exploitation or a zero probability.

Dated risk observations

Risk history is separate from CNA/OSV content history. Daily score drift is retained but only an upward crossing of 10% triggers the prediction change event.

Immutable source observations

8 recorded revisions

Each citation identifies one complete source statement. Source modification dates and the time this installation observed them are distinct. Latest history includes records historically associated by source identifiers; a removed alias is not a current equivalence claim. Exact citations show that source record's own earlier observations. Failed reads and unchanged polls do not rewrite history.

1 Nov 2026 06:07:42 UTC

Wasmtime is a runtime for WebAssembly. Prior to 24.0.7, 36.0.7, 42.0.2, and 43.0.1, Wasmtime contains a vulnerability where when transcoding a UTF-16 string to the latin1+utf16 component-model encoding it would incorrectly validate the byte…

euvd · EUVD-2026-20988 · Published

30 Oct 2026 05:51:49 UTC

Wasmtime is a runtime for WebAssembly. Prior to 24.0.7, 36.0.7, 42.0.2, and 43.0.1, Wasmtime contains a vulnerability where when transcoding a UTF-16 string to the latin1+utf16 component-model encoding it would incorrectly validate the byte…

euvd · EUVD-2026-20988 · Published

28 Oct 2026 04:54:03 UTC

Wasmtime is a runtime for WebAssembly. Prior to 24.0.7, 36.0.7, 42.0.2, and 43.0.1, Wasmtime contains a vulnerability where when transcoding a UTF-16 string to the latin1+utf16 component-model encoding it would incorrectly validate the byte…

euvd · EUVD-2026-20988 · Published

27 Oct 2026 09:03:08 UTC

Wasmtime is a runtime for WebAssembly. Prior to 24.0.7, 36.0.7, 42.0.2, and 43.0.1, Wasmtime contains a vulnerability where when transcoding a UTF-16 string to the latin1+utf16 component-model encoding it would incorrectly validate the byte…

nvd · CVE-2026-34941 · Published

25 Oct 2026 08:17:35 UTC

Wasmtime is a runtime for WebAssembly. Prior to 24.0.7, 36.0.7, 42.0.2, and 43.0.1, Wasmtime contains a vulnerability where when transcoding a UTF-16 string to the latin1+utf16 component-model encoding it would incorrectly validate the byte…

nvd · CVE-2026-34941 · Published

24 Oct 2026 13:19:54 UTC

Wasmtime: Heap OOB read in component model UTF-16 to latin1+utf16 string transcoding

osv · GHSA-hx6p-xpx3-jvvv · Published

24 Oct 2026 13:19:54 UTC

Heap OOB read in component model UTF-16 to latin1+utf16 string transcoding

osv · RUSTSEC-2026-0093 · Published

23 Oct 2026 15:48:27 UTC

Wasmtime has a Heap OOB read in component model UTF-16 to latin1+utf16 string transcoding

cve-program · CVE-2026-34941 · Published

ChangeIntel

An IT change radar: releases, security, known issues, retirements, documentation changes, and service status from public sources. Every item links to supporting evidence; dates and statuses can change after they are read.

Sources read 1 Nov 19:21 UTC · 275 of 275 readable · 272 fully read · documentation 469/469 current