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+```toml
+[advisory]
+id = "RUSTSEC-0000-0000"
+package = "sfbinpack"
+date = "2026-05-02"
+url = "https://github.com/Disservin/binpack-rust/issues/17"
+informational = "unsound"
+categories = ["memory-corruption"]
+keywords = ["out-of-bounds"]
+
+[versions]
+patched = []
+```
+
+# Out-of-bounds read via `BitReader` in `CompressedTrainingDataEntryReader`
+
+`CompressedTrainingDataEntryReader` constructs a `BitReader` from a raw
+pointer without tracking length. A crafted chunk with `num_plies > 0` but no
+movetext bytes triggers out-of-bounds reads via the `BitReader`, which uses
+`*self.movetext.add(self.read_offset)` without bounds checks.
+
+This can be triggered through safe public APIs —
+`CompressedTrainingDataEntryReader::new()` and `.next()` — with no `unsafe`
+required from the caller.
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