CVE-2026-73568

creationtimestamp| type| source ---|---|--- 2026-08-13 18:35:10+00:00| published-proof-of-concept| https://github.com/libp2p/py-libp2p/security/advisories/GHSA-hmj8-5xmh-5573...

CVE-2026-73568

py-libp2p is the Python implementation of the libp2p networking stack. In 0.7.0 and earlier, the yamux handleincoming method in libp2p/streammuxer/yamux/yamux.py reads an attacker-controlled 32-bit DATA frame length with readexactly before validating it against MAXWINDOWSIZE or checking whether...

CVE-2026-73568 py-libp2p: yamux connection DoS via oversized data frame

py-libp2p is the Python implementation of the libp2p networking stack. In 0.7.0 and earlier, the yamux handleincoming method in libp2p/streammuxer/yamux/yamux.py reads an attacker-controlled 32-bit DATA frame length with readexactly before validating it against MAXWINDOWSIZE or checking whether...

EUVD-2026-58183

py-libp2p is the Python implementation of the libp2p networking stack. In 0.7.0 and earlier, the yamux handleincoming method in libp2p/streammuxer/yamux/yamux.py reads an attacker-controlled 32-bit DATA frame length with readexactly before validating it against MAXWINDOWSIZE or checking whether...

CVE-2026-73568 py-libp2p: yamux connection DoS via oversized data frame

py-libp2p is the Python implementation of the libp2p networking stack. In 0.7.0 and earlier, the yamux handleincoming method in libp2p/streammuxer/yamux/yamux.py reads an attacker-controlled 32-bit DATA frame length with readexactly before validating it against MAXWINDOWSIZE or checking whether...

CVE-2026-73568

py-libp2p (Python implementation of libp2p) before 0.7.0 has a yamux handle_incoming() flaw in libp2p/stream_muxer/yamux/yamux.py: it reads a 32-bit DATA frame length with read_exactly() before validating against MAX_WINDOW_SIZE or checking stream_id. A peer completing the Noise handshake can sen...

CVE-2026-52878

Klever-Go is the Go implementation of the Klever blockchain protocol. Versions 1.7.14 through 1.7.17 are vulnerable to a nil-pointer panic triggered by a protobuf Transaction whose embedded RawData sub-message is omitted. This omission causes RawData to decode to nil. Every transaction gossiped o...

GHSA-HMJ8-5XMH-5573 libp2p: yamux connection DoS via oversized data frame

Summary The yamux stream multiplexer in py-libp2p does not validate incoming DATA frame lengths against the receive window before reading the frame body. Any peer that completes a standard libp2p handshake can send a single 12-byte frame claiming a 4 GB body, causing the victim's yamux read loop ...

GHSA-CWC9-CP4J-MCVV libp2p: CPU DoS via oversized IHAVE and IWANT control message arrays

Summary gossipsub processes IHAVE and IWANT control messages by iterating every received message ID synchronously before doing anything with the results. There is no cap on how many IDs a single frame may contain. The default LP frame limit is 4MB, which fits roughly 180,000 message IDs. Iteratin...

EUVD-2026-42409

libp2p: CPU DoS via oversized IHAVE and IWANT control message arrays...

Allocation of Resources Without Limits or Throttling

Overview @libp2p/gossipsub is an A typescript implementation of gossipsub Affected versions of this package are vulnerable to Allocation of Resources Without Limits or Throttling via the defaultDecodeRpcLimits in which maxIhaveMessageIDs and maxIwantMessageIDs are set to Infinity, allowing...

CVE-2026-49866

libp2p is a JavaScript Implementation of libp2p networking stack. Prior to 16.0.0, @libp2p/gossipsub defaultDecodeRpcLimits set maxIhaveMessageIDs and maxIwantMessageIDs to Infinity, allowing oversized IHAVE and IWANT control message arrays in message/decodeRpc.ts and gossipsub.ts to synchronousl...

CVE-2026-49866 libp2p: CPU DoS via oversized IHAVE and IWANT control message arrays

libp2p is a JavaScript Implementation of libp2p networking stack. Prior to 16.0.0, @libp2p/gossipsub defaultDecodeRpcLimits set maxIhaveMessageIDs and maxIwantMessageIDs to Infinity, allowing oversized IHAVE and IWANT control message arrays in message/decodeRpc.ts and gossipsub.ts to synchronousl...

CVE-2026-49866

CVE-2026-49866 affects the JavaScript libp2p implementation, specifically the @libp2p/gossipsub component. The root cause is defaultDecodeRpcLimits allowing maxIhaveMessageIDs and maxIwantMessageIDs to be Infinity prior to v16.0.0, enabling oversized IHAVE/IWANT control message arrays in message/...

CVE-2026-49866 libp2p: CPU DoS via oversized IHAVE and IWANT control message arrays

libp2p is a JavaScript Implementation of libp2p networking stack. Prior to 16.0.0, @libp2p/gossipsub defaultDecodeRpcLimits set maxIhaveMessageIDs and maxIwantMessageIDs to Infinity, allowing oversized IHAVE and IWANT control message arrays in message/decodeRpc.ts and gossipsub.ts to synchronousl...

PT-2026-56603

Name of the Vulnerable Software and Affected Versions libp2p versions prior to 16.0.0 Description In the @libp2p/gossipsub module, the defaultDecodeRpcLimits configuration sets maxIhaveMessageIDs and maxIwantMessageIDs to Infinity. This allows oversized IHAVE and IWANT control message arrays in...

PYSEC-2026-1536 py-libp2p is vulnerable to DoS attacks through use of large RSA keys

py-libp2p before 0.2.3 allows a peer to cause a denial of service resource consumption via a large RSA key...

CVE-2026-45783

libp2p is a JavaScript Implementation of libp2p networking stack. Prior to version 16.2.6, an unauthenticated remote peer can exhaust the disk storage of any @libp2p/kad-dht node running in server mode by sending an unbounded stream of PUTVALUE messages whose keys bypass all content validation. N...

CVE-2026-45783 libp2p: Unvalidated PUT_VALUE records allow unbounded disk exhaustion on DHT server nodes

libp2p is a JavaScript Implementation of libp2p networking stack. Prior to version 16.2.6, an unauthenticated remote peer can exhaust the disk storage of any @libp2p/kad-dht node running in server mode by sending an unbounded stream of PUTVALUE messages whose keys bypass all content validation. N...

EUVD-2026-36153

libp2p is a JavaScript Implementation of libp2p networking stack. Prior to version 16.2.6, an unauthenticated remote peer can exhaust the disk storage of any @libp2p/kad-dht node running in server mode by sending an unbounded stream of PUTVALUE messages whose keys bypass all content validation. N...