diff --git a/src/psbt.h b/src/psbt.h
index d8a4a52dede..9d7fc05b791 100644
--- a/src/psbt.h
+++ b/src/psbt.h
@@ -207,6 +207,9 @@ void DeserializeMuSig2ParticipantPubkeys(Stream& s, SpanReader& skey, std::map<C
     std::array<unsigned char, CPubKey::COMPRESSED_SIZE> agg_pubkey_bytes;
     skey >> std::as_writable_bytes(std::span{agg_pubkey_bytes});
     CPubKey agg_pubkey(agg_pubkey_bytes);
+    if (!agg_pubkey.IsFullyValid()) {
+        throw std::ios_base::failure(context + " musig2 aggregate pubkey is invalid");
+    }
 
     std::vector<CPubKey> participants;
     std::vector<unsigned char> val;
@@ -215,7 +218,11 @@ void DeserializeMuSig2ParticipantPubkeys(Stream& s, SpanReader& skey, std::map<C
     while (s_val.size() >= CPubKey::COMPRESSED_SIZE) {
         std::array<unsigned char, CPubKey::COMPRESSED_SIZE> part_pubkey_bytes;
         s_val >> std::as_writable_bytes(std::span{part_pubkey_bytes});
-        participants.emplace_back(std::span{part_pubkey_bytes});
+        CPubKey participant(part_pubkey_bytes);
+        if (!participant.IsFullyValid()) {
+            throw std::ios_base::failure(context + " musig2 participant pubkey is invalid");
+        }
+        participants.push_back(participant);
     }
     if (!s_val.empty()) {
         throw std::ios_base::failure(context + " musig2 participants pubkeys value size is not a multiple of 33");
diff --git a/test/functional/data/rpc_psbt.json b/test/functional/data/rpc_psbt.json
index 062a54936af..752fce558fa 100644
--- a/test/functional/data/rpc_psbt.json
+++ b/test/functional/data/rpc_psbt.json
@@ -55,8 +55,24 @@
             "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",
             "Input musig2 participants pubkeys aggregate key is not 34 bytes"
         ],
+        [
+            "cHNidP8BADMAAZJuAQAAAAAAAAAAAABMHQD/AAAAAAAAAAAA//////9BAB4AjIwAAAD5////AAAA/NwAAQErYQIAAAAAAAAiUSBw/G0rYgJicCsrtgAA2P//+HN0AAIA+f//7gAF++8AACIaCAEAAP8AcHNidP8BABMAAiEeAAEXDD4AAAEBAACCpP73IUL8j3+PjNNzYnT/AAAAAAAAlpb/AAAAAAAAAAYEAisAAAA=",
+            "Input musig2 aggregate pubkey is invalid"
+        ],
+        [
+            "cHNidP8BAP0+AQIAAAAGy4dxGNHKAQgFPtEAoVgyMqb+N0ghgmdne5OjULYs2sUAAAr/AP3////LfnEY0crZmwU+EVahszExpv43SCGCZ2d7k6NQtizaOwADAC4ABHwdAMt+cRjRytmbBT4RVqFYMTGm/jdIIYJnZ3uTo1AAOwAsAAC2KwD9////hqbXlTl39C5ZmAtOAI4+zy32vWLVnyQjw7IvQsBa6rYAAAcAAP3//zKG/zqgb7JIwmli68xeUjUXVp+c4b/tvc55IsAI4yQAAAAAAAAA/f///8t/0cpxGNmbBT4RVqFYMTOm/jdIIXj///8AAAAAgNo7AACAAAD9//3/AiHf9QUAAAAAFgAU9/Ykq9yiCFGnUpsiRsS6FFGLkQEAAAAAAAABABYAFEEQliEApQAADCBABv78gsn+/////wAAAAAAAAAAACIagHQAAAAVDLQyJycoAHNiKDIDAEIAAEEA/wEABgDI/jdIIYJnZ3uTo1AAOwAsAAC2KwD9////hqbXAY9zeZ10c/zcAAEBK2ECEWUrKwAAIlEgcPx0K2ICYgQkKwABAQEBAQsCAgAERUIADwADAAADmSsAAAA=",
+            "Input musig2 aggregate pubkey is invalid"
+        ],
+        [
+            "cHNidP8BAKMgICAgAyAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgIAAg////ICAgICAgICAgICAgICAgICAgICAgICAgICAgIP///yAgICAgACAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAg/////////yAAICAgIAMgICAgICAgIAMgICAgICAgICAgIAAgICAgICAgIAAgICAgAAEBKyD/ICAgICAgIlEgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAiGgIAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAACECICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAAAAAAAAA=",
+            "Input musig2 aggregate pubkey is invalid"
+        ],
         [
             "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",
+            "Input musig2 participant pubkey is invalid"
+        ],
+        [
+            "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",
             "Input musig2 participants pubkeys value size is not a multiple of 33"
         ],
         [
@@ -65,7 +81,7 @@
         ],
         [
             "cHNidP8BAH0CAAAAASWJ53Z5WLoVT5AYzM8N7ephR7tgzRoZS241kKmWVpDWAAAAAAD9////AoCWmAAAAAAAIlEgKWfS0CCpeV2nK1G+Tz/KJbsOV+kcWz56gav6cjKjSUIPwJJ8AAAAABYAFDScXTMCeMMAKmT1l9KwGqPcG9kDAAAAAAABAH0CAAAAAZqLSlB5a5YAmQ9/4R36ALxw79KWBIr8hnGa8PsfqRk3AAAAAAD9////AolcK30AAAAAFgAUz9mLoQJ+pO1L0q4bNIthVqAVA3UA4fUFAAAAACJRINCyJsZZnyc4dN+P5oSrbDAoCBvuiiy+0xoTb1hl9s+k4QAAAAEBH4lcK30AAAAAFgAUz9mLoQJ+pO1L0q4bNIthVqAVA3UiBgKmZlDwi/+k8InrIu3NvnYWZF/2zRgKNkhNS8gQVFlbexi//0SjVAAAgAEAAIAAAACAAQAAAIoCAAAAAQUgC1jjN6pNOFKowpOHxCQI2M++OmE6Xjl+Cp8BpftxB9QhBwtY4zeqTThSqMKTh8QkCNjPvjphOl45fgqfAaX7cQfUBQAmgN1uIQc0a5lZM1cQfJ00Weneuo0+r0TmY2yFx/hT65C6UujNAAUAWAsIhyEHT6/WX4FpGG/Cv9siM8d+Yw0QvigKJMcWXAmidhF3XCwFAMMkmoIhB/kwigGSWMMQSTRPhfidUim1MchFg2+ZsIYB8RO84Db5BQB91lWSIggDC1jjN6pNOFKowpOHxCQI2M++OmE6Xjl+Cp8BpftxB9RiNGuZWTNXEHydNFnp3rqNPq9E5mNshcf4U+uQulLozQACT6/WX4FpGG/Cv9siM8d+Yw0QvigKJMcWXAmidhF3XCwC+TCKAZJYwxBJNE+F+J1SKbUxyEWDb5mwhgHxE7zgNvkAIgIDvkrlPTfMB19Asw1tpHKdQK3uuYNTOvFhYZK8dtWyYSoYv/9Eo1QAAIABAACAAAAAgAEAAACNAgAAAA==",
-            "Output musig2 participants pubkeys value size is not a multiple of 33"
+            "Output musig2 participant pubkey is invalid"
         ],
         [
             "cHNidP8BAFICAAAAAVaG3/QAFl9OBApYVfZYCTRyybz4EIsnKl0x8YH3tP+xAQAAAAD9////ARjd9QUAAAAAFgAUyRI+BujX8JZsXRzQ+TMALU63V80AAAAAAAEBKwDh9QUAAAAAIlEgC1jjN6pNOFKowpOHxCQI2M++OmE6Xjl+Cp8BpftxB9QhFgtY4zeqTThSqMKTh8QkCNjPvjphOl45fgqfAaX7cQfUBQAmgN1uIRY0a5lZM1cQfJ00Weneuo0+r0TmY2yFx/hT65C6UujNAAUAWAsIhyEWT6/WX4FpGG/Cv9siM8d+Yw0QvigKJMcWXAmidhF3XCwFAMMkmoIhFvkwigGSWMMQSTRPhfidUim1MchFg2+ZsIYB8RO84Db5BQB91lWSIhoDC1jjN6pNOFKowpOHxCQI2M++OmE6Xjl+Cp8BpftxB9RjAjRrmVkzVxB8nTRZ6d66jT6vROZjbIXH+FPrkLpS6M0AAk+v1l+BaRhvwr/bIjPHfmMNEL4oCiTHFlwJonYRd1wsAvkwigGSWMMQSTRPhfidUim1MchFg2+ZsIYB8RO84Db5QhsCNGuZWTNXEHydNFnp3rqNPq9E5mNshcf4U+uQulLozQALWOM3qk04UqjCk4fEJAjYz746YTpeOX4KnwGl+3EH1EICUpsZ14eczATJFUh/XxNBvGhYsLx05QNsZD03tTpDcbUDt/iv4yY/yz7yRU/hbzpnWcVgDHjmN7jfoNg+hVKIIFZDGwJPr9ZfgWkYb8K/2yIzx35jDRC+KAokxxZcCaJ2EXdcLAMLWOM3qk04UqjCk4fEJAjYz746YTpeOX4KnwGl+3EH1EIDqB2XNJnnT4LStasT8eaenhGl/bQPVGbvZy5uTOugvnkDSZWTdnFQOU7s44TQUcRbYVxS2+HI6zYQ17NEtDt9rW1DGwL5MIoBkljDEEk0T4X4nVIptTHIRYNvmbCGAfETvOA2+QMLWOM3qk04UqjCk4fEJAjYz746YTpeOX4KnwGl+3EH1EIDOUnb/zG51QJR2IIeZsxcl7fjr9fZW/3HdQD9qJR/OuACPyDk8L8LdvDUDNOr/nzjc9ZoW713tfoo5/SftCnRibAAAA==",