EUVD-2026-79501
GHSA-5hq8-qhww-jm7q
Severity by source
CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Primary rating from Vendor (github) · only source for this CVE.
CVSS VectorVendor: github
Lifecycle Timeline
5DescriptionCVE.org
libp2p-rust is the official Rust language implementation of the libp2p networking stack. Prior to 0.13.1, libp2p-quic could panic during an inbound QUIC handshake when a remote peer presented a valid short-lived libp2p TLS certificate and delayed the final TLS 1.3 handshake fragment until after the certificate expired. In the Quinn post-handshake upgrade path, transports/quic/src/connection/connecting.rs called libp2p_tls::certificate::parse a second time in remote_peer_id and used expect on the result. The repeated wall-clock validity check could reject the now-expired certificate, causing the expect call to terminate any application exposing an affected libp2p-quic listener. This vulnerability is fixed in 0.13.1.
AnalysisAI
Remote unauthenticated denial of service in the libp2p-quic transport crate (Rust implementation of libp2p) prior to 0.13.1: a peer that completes a valid-looking QUIC/TLS handshake with a deliberately short-lived libp2p TLS certificate and then withholds the final TLS 1.3 handshake fragment until that certificate expires triggers a wall-clock validity re-check in the post-handshake upgrade path, where an expect() call panics and tears down the application hosting the QUIC listener. Only a single inbound connection from a network peer is needed, no malformed packets are required, and the attack is fully automatable against any service exposing an affected libp2p-quic listener. …
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Same weakness CWE-248 – Uncaught Exception
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External POC / Exploit Code
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