{"@context":"https://openvex.dev/ns/v0.2.0","@id":"https://database.harborguard.co/cve/CVE-2026-47261/vex.json","author":"HarborGuard Database","role":"Document Creator","timestamp":"2026-06-15T19:47:40.366Z","version":1,"tooling":"HarborGuard Database (https://database.harborguard.co)","statements":[{"vulnerability":{"name":"CVE-2026-47261","@id":"https://www.cve.org/CVERecord?id=CVE-2026-47261","description":"Wasmtime is a runtime for WebAssembly. In versions prior to 24.0.9, 36.0.10, and 44.0.2, when a filesystem preopen is given DirPerms::all() and FilePerms::READ without FilePerms::WRITE, this access control mechanism can be bypassed via the wasip2 descriptor.open-at or wasip1 path_open interfaces by opening a file with only the OpenFlags::TRUNCATE oflag. The root cause is that the clause handling OpenFlags::TRUNCATE in crates/wasi/src/filesystem.rs (Dir::open_at, lines 967–969) did not set open_m"},"products":[{"@id":"cpe:2.3:a:bytecodealliance:wasmtime:*:*:*:*:*:*:*:*","identifiers":{"cpe23":"cpe:2.3:a:bytecodealliance:wasmtime:*:*:*:*:*:*:*:*"}}],"status":"affected","action_statement":"No fixed version is published yet; monitor the upstream advisory.","timestamp":"2026-06-15T19:47:40.366Z"}]}