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Objects fetched from the store are untrusted; several decode paths let one expand or print without limit. - blobgen.LimitReader errors past a byte cap (not io.LimitReader's silent EOF). DecodeManifest reads through caps on both compressed input and decompressed output, far above any real manifest, so json.Decode cannot buffer a compressible bomb. FetchAndDecryptBlob bounds decompression to the blob's recorded uncompressed_size (not the restoring host's blob_size_limit). - downloadSnapshotDB streams straight from storage to its temp file with io.Copy, replacing two ReadAll calls that held the whole database twice. - FetchBlob drops the per-blob Stat round-trip, its expectedSize parameter and returned size, all of which only fed a debug log. - TTYHandler and ui.Writer escape control characters in messages, attribute keys/values, and rendered identifiers/paths before colour codes are applied, so a crafted value cannot drive the terminal. Model: opus-4-8