OSV-2026-1361 Bad parameters to --sanitizer-annotate-contiguous-container in jsoncons::cbor::basic_cbor_parser<jsoncons::stream_source<unsigned char, std::__

OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=568595812 Crash type: Bad parameters to --sanitizer-annotate-contiguous-container Crash state: jsoncons::cbor::basiccborparserjsoncons::streamsourceunsigned char, std:: void...

jsoncons:fuzz_cbor_encoder: Bad parameters to --sanitizer-annotate-contiguous-container in jsoncons::cbor::basic_cbor_parser<jsoncons::stream_source<unsigned char, std::__

Project: https://github.com/danielaparker/jsoncons.git Detailed Report: https://oss-fuzz.com/testcase?key=5862127433482240 Project: jsoncons Fuzzing Engine: afl Fuzz Target: fuzzcborencoder Job Type: aflasanjsoncons Platform Id: linux Crash Type: Bad parameters to...

ANT-2026-MAPZGQDY · jsoncons · Heap-buffer-overflow

heap-buffer-overflow high Severity Claude high · Security research firm high · Maintainer - Discovered by Claude Mythos Preview REPORT Anthropic's analysis, sealed at approval. Disclosure to the maintainer was performed by Ada Logics. ANT-2026-MAPZGQDY: Heap-buffer-overflow in bigint.hpp:260 Duri...

jsoncons:fuzz_cbor_parser_max: Heap-buffer-overflow in jsoncons::cbor::basic_cbor_parser<jsoncons::stream_source<unsigned char, std::__

Project: https://github.com/danielaparker/jsoncons.git Detailed Report: https://oss-fuzz.com/testcase?key=5246852585553920 Project: jsoncons Fuzzing Engine: honggfuzz Fuzz Target: fuzzcborparsermax Job Type: honggfuzzasanjsoncons Platform Id: linux Crash Type: Heap-buffer-overflow READ 1 Crash...

jsoncons:fuzz_msgpack: Heap-buffer-overflow in jsoncons::heap::heap_string_factory<unsigned char, unsigned long, std::__1::allo

Project: https://github.com/danielaparker/jsoncons.git Detailed Report: https://oss-fuzz.com/testcase?key=5217334684614656 Project: jsoncons Fuzzing Engine: honggfuzz Fuzz Target: fuzzmsgpack Job Type: honggfuzzasanjsoncons Platform Id: linux Crash Type: Heap-buffer-overflow READ 1 Crash Address:...

jsoncons:fuzz_ubjson_parser_max: Heap-buffer-overflow in jsoncons::ubjson::basic_ubjson_parser<jsoncons::stream_source<unsigned char, std

Project: https://github.com/danielaparker/jsoncons.git Detailed Report: https://oss-fuzz.com/testcase?key=5094934559129600 Project: jsoncons Fuzzing Engine: libFuzzer Fuzz Target: fuzzubjsonparsermax Job Type: libfuzzerasanjsoncons Platform Id: linux Crash Type: Heap-buffer-overflow READ 1 Crash...

jsoncons:fuzz_cbor: Heap-buffer-overflow in jsoncons::cbor::basic_cbor_parser<jsoncons::stream_source<unsigned char, std::__

Project: https://github.com/danielaparker/jsoncons.git Detailed Report: https://oss-fuzz.com/testcase?key=5082885028380672 Project: jsoncons Fuzzing Engine: libFuzzer Fuzz Target: fuzzcbor Job Type: libfuzzerasanjsoncons Platform Id: linux Crash Type: Heap-buffer-overflow READ 1 Crash Address:...

jsoncons:fuzz_msgpack: Heap-buffer-overflow in std::__1::enable_if<std::is_same<std::__1::iterator_traits<unsigned char const*>

Project: https://github.com/danielaparker/jsoncons.git Detailed Report: https://oss-fuzz.com/testcase?key=5065588456882176 Project: jsoncons Fuzzing Engine: libFuzzer Fuzz Target: fuzzmsgpack Job Type: libfuzzerasanjsoncons Platform Id: linux Crash Type: Heap-buffer-overflow READ 1 Crash Address:...

jsoncons:fuzz_cbor_encoder: Heap-use-after-free in jsoncons::cbor::cbor_mdarray_row_major_iterator<jsoncons::stream_source<unsigned

Project: https://github.com/danielaparker/jsoncons.git Detailed Report: https://oss-fuzz.com/testcase?key=4834232383111168 Project: jsoncons Fuzzing Engine: libFuzzer Fuzz Target: fuzzcborencoder Job Type: libfuzzerasanjsoncons Platform Id: linux Crash Type: Heap-use-after-free READ 8 Crash...

jsoncons:fuzz_cbor_encoder: Bad-cast to jsoncons::cbor::cbor_mdarray_row_major_iterator<jsoncons::stream_source<unsigned char>, std::allocator<char>> from invalid vptr in jsoncons::cbor::cbor_mdarray_row_major_iterator<jsoncons::stream_source<unsigned

Project: https://github.com/danielaparker/jsoncons.git Detailed Report: https://oss-fuzz.com/testcase?key=4549385555083264 Project: jsoncons Fuzzing Engine: libFuzzer Fuzz Target: fuzzcborencoder Job Type: libfuzzerubsanjsoncons Platform Id: linux Crash Type: Bad-cast Crash Address: 0x5b1f102138e...

jsoncons:fuzz_cbor: Heap-buffer-overflow in jsoncons::mdarray_iterator<double>::next

Project: https://github.com/danielaparker/jsoncons.git Detailed Report: https://oss-fuzz.com/testcase?key=4539821292060672 Project: jsoncons Fuzzing Engine: libFuzzer Fuzz Target: fuzzcbor Job Type: libfuzzerasanjsoncons Platform Id: linux Crash Type: Heap-buffer-overflow READ 8 Crash Address:...

jsoncons:fuzz_json_encoder: Heap-buffer-overflow in jsoncons::basic_json_parser<char, std::__1::allocator<char>>::skip_space

Project: https://github.com/danielaparker/jsoncons.git Detailed Report: https://oss-fuzz.com/testcase?key=6366501096980480 Project: jsoncons Fuzzing Engine: libFuzzer Fuzz Target: fuzzjsonencoder Job Type: libfuzzerasanjsoncons Platform Id: linux Crash Type: Heap-buffer-overflow READ 1 Crash...

jsoncons:fuzz_json_cursor: Segv on unknown address with empty stacktrace

Detailed Report: https://oss-fuzz.com/testcase?key=5194851282911232 Project: jsoncons Fuzzing Engine: libFuzzer Fuzz Target: fuzzjsoncursor Job Type: libfuzzerasanjsoncons Platform Id: linux Crash Type: Segv on unknown address Crash Address: Crash State: NULL Sanitizer: address ASAN Crash Revisio...

OSV-2021-821 Stack-buffer-overflow in jsoncons::bson::decimal128_to_chars

OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=34816 Crash type: Stack-buffer-overflow WRITE 6 Crash state: jsoncons::bson::decimal128tochars jsoncons::bson::basicbsonparserjsoncons::binarystreamsource, std::1::allo...

PT-2021-28291

Name of the Vulnerable Software and Affected Versions: jsoncons affected versions not specified Description: The issue is related to a stack-buffer-overflow crash. Technical details about the crash include the decimal128 to chars function and the basic bson parser function. The crash type is...

jsoncons:fuzz_bson_parser_max: Stack-buffer-overflow in jsoncons::bson::decimal128_to_chars

Project: https://github.com/danielaparker/jsoncons.git Detailed Report: https://oss-fuzz.com/testcase?key=5718811251703808 Project: jsoncons Fuzzing Engine: libFuzzer Fuzz Target: fuzzbsonparsermax Job Type: libfuzzerasanjsoncons Platform Id: linux Crash Type: Stack-buffer-overflow WRITE 6 Crash...

jsoncons:fuzz_bson_encoder: Index-out-of-bounds in jsoncons::bson::decimal128_from_chars

Project: https://github.com/danielaparker/jsoncons.git Detailed Report: https://oss-fuzz.com/testcase?key=5420549982519296 Project: jsoncons Fuzzing Engine: libFuzzer Fuzz Target: fuzzbsonencoder Job Type: libfuzzerubsanjsoncons Platform Id: linux Crash Type: Index-out-of-bounds Crash Address:...

OSV-2021-703 Container-overflow in unsigned long jsoncons::detail::escape_string<char, jsoncons::string_sink<std::_

OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=33781 Crash type: Container-overflow READ 1 Crash state: unsigned long jsoncons::detail::escapestring::key...

PT-2021-28238

Name of the Vulnerable Software and Affected Versions: jsoncons affected versions not specified Description: A crash occurs due to a container-overflow read issue in the jsoncons library, specifically in the escape string function. The crash is related to the jsoncons::basic json encoder and...

jsoncons:fuzz_json_encoder: Container-overflow in unsigned long jsoncons::detail::escape_string<char, jsoncons::string_sink<std::_

Project: https://github.com/danielaparker/jsoncons.git Detailed Report: https://oss-fuzz.com/testcase?key=5639543840702464 Project: jsoncons Fuzzing Engine: libFuzzer Fuzz Target: fuzzjsonencoder Job Type: libfuzzerasanjsoncons Platform Id: linux Crash Type: Container-overflow READ 1 Crash Addres...