CVE-2026-57082

Net::BitTorrent versions through 2.0.1 for Perl generate the MSE Diffie-Hellman private key with a non-cryptographic PRNG. The MSE Message Stream Encryption handshake derives its 160-bit Diffie-Hellman private key from Perl's rand, a non-cryptographic drand48-class generator seeded once per...

CVE-2026-57082

The CVE-2026-57082 issue affects Net::BitTorrent for Perl (up to version 2.0.1). The MSE handshake derives its 160-bit Diffie-Hellman private key from Perl’s rand(), a non-cryptographic PRNG seeded once per process, via KeyExchange.pm. As a result, the shared secret and the RC4 keys (SHA-1("keyA"...

CVE-2026-57081

CVE-2026-57081 affects Net::BitTorrent for Perl up to version 2.0.1. The root cause is unbounded recursion in the bdecode decoder: each nested list/dictionary level causes a recursive call that copies the remaining input buffer, producing O(N^2) memory growth for deeply nested inputs. In practice...

CVE-2026-57080

Net::BitTorrent versions through 2.0.1 for Perl allow remote memory exhaustion via an uncapped peer-wire message-length prefix. The peer-wire framing in processmessages trusts the 4-byte length prefix sent by a connected peer with no upper bound, while receivedata appends every inbound byte to th...

CVE-2026-57080

Net::BitTorrent (Perl) up to version 2.0.1 is affected by a memory-exhaustion vulnerability caused by an unbounded 4-byte peer-wire message-length prefix in _process_messages. The decoder waits for a full message before processing, allowing the input buffer to grow without limit when a peer annou...

EUVD-2026-40289

Net::BitTorrent versions through 2.0.1 for Perl allow remote memory exhaustion via an uncapped peer-wire message-length prefix. The peer-wire framing in processmessages trusts the 4-byte length prefix sent by a connected peer with no upper bound, while receivedata appends every inbound byte to th...

CVE-2026-57079 Net::BitTorrent versions through 2.0.1 for Perl write files outside the download directory via path traversal in peer-supplied metadata

Net::BitTorrent versions through 2.0.1 for Perl write files outside the download directory via path traversal in peer-supplied metadata. Net::BitTorrent validates file path components only on the .torrent-file ingest path. The peer and magnet metadata path onmetadatareceived, reached from the BEP...