Libp2P Py Libp2P vulnerabilities

2 vulnerabilities

Known vulnerabilities in Libp2P Py Libp2P, newest first, with CVSS severity, EPSS, KEV listings, ransomware use and the affected versions.

4.3CVE-2025-29606libp2ppy-libp2p+1
EPSS score
0.38%
py-libp2p before 0.2.3 allows a peer to cause a denial of service (resource consumption) via a large RSA key.7.5CVE-2026-73568libp2ppy-libp2p+1
EPSS score
0.49%
py-libp2p is the Python implementation of the libp2p networking stack. In 0.7.0 and earlier, the yamux handle_incoming() method in libp2p/stream_muxer/yamux/yamux.py reads an attacker-controlled 32-bit DATA frame length with read_exactly() before validating it against MAX_WINDOW_SIZE or checking whether stream_id exists. A peer that completes the standard Noise handshake can send a 12-byte frame declaring a 0xFFFFFFFF body and then withhold the body, causing the sequential yamux read loop used by the default new_host() configuration to block and preventing every stream on that connection from making progress. No fixed version is available as of this review.