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-rw-r--r--src/psbt.h3
1 files changed, 3 insertions, 0 deletions
diff --git a/src/psbt.h b/src/psbt.h
index eef7d7dd3b..d5c67802c7 100644
--- a/src/psbt.h
+++ b/src/psbt.h
@@ -641,6 +641,9 @@ struct PSBTInput
s >> leaf_hashes;
size_t after_hashes = s.size();
size_t hashes_len = before_hashes - after_hashes;
+ if (hashes_len > value_len) {
+ throw std::ios_base::failure("Input Taproot BIP32 keypath has an invalid length");
+ }
size_t origin_len = value_len - hashes_len;
m_tap_bip32_paths.emplace(xonly, std::make_pair(leaf_hashes, DeserializeKeyOrigin(s, origin_len)));
break;