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-2026-73568: Uncontrolled Resource Consumption

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-2026-52878

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...

CVE-2026-52878: NULL Pointer Dereference

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...

autonet-computer (>=0.1.2, <=0.7.3), diap-sdk (>=0.1.4, <=0.1.5) +6 more potentially affected by unknown CVE via libp2p (>=0.1.1, <=0.7.0)

libp2p PYPI version =0.1.1, =0.1.2, =0.1.4, =0.1.0, =0.1.2, =0.1.0, =0.1.0, =0.1.0a28, =0.1.0a36 Source cves: unknown CVE Source advisory: SNYK:PYTHON-LIBP2P-18313058...

Improper Validation of Specified Quantity in Input

Overview libp2p is a libp2p: The Python implementation of the libp2p networking stack Affected versions of this package are vulnerable to Improper Validation of Specified Quantity in Input through the handleincoming process. An attacker can cause the read loop to block indefinitely by sending a...

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 ...

PT-2026-71716

Name of the Vulnerable Software and Affected Versions py-libp2p versions 0.7.0 and earlier Description The handle incoming function in the yamux module reads a 32-bit DATA frame length using read exactly before validating it against MAX WINDOW SIZE or verifying the existence of the stream id. A...

delay_timer (0.11.6), libp2p-swarm-test (0.1.0) potentially affected by unknown CVE via event-listener (>=5.3.0, <=5.4.1)

event-listener CARGO version =5.3.0, =5.4.1 is affected by a known vulnerability. The following packages have a transitive dependency on event-listener and may be impacted: - delaytimer 0.11.6 - libp2p-swarm-test 0.1.0 Source cves: unknown CVE Source advisory: OSV:RUSTSEC-2026-0221...

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...

@bitsocial/ai-moderation-challenge (>=0.1.0, <=0.1.1), @bitsocial/bitsocial-cli (>=0.19.44, <=0.19.72) +6 more potentially affected by CVE-2026-49866 via @libp2p/gossipsub (>=15.0.0-049bfa0fa, <=15.0.22-5692f3f16)

@libp2p/gossipsub NPM version =15.0.0-049bfa0fa, =0.1.0, =0.19.44, =0.1.0, =0.1.0, =0.1.0, =6.0.0-049bfa0fa, =9.0.0-049bfa0fa, =0.0.17, =0.0.47 Source cves: CVE-2026-49866 Source advisory: SNYK:JS-LIBP2PGOSSIPSUB-17901717...

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...

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...