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CVE-2026-61544— libp2p-quic: Remote panic via certificate expiry race during QUIC handshake

Quick assessment

Affected
libp2p rust-libp2p
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

libp2p-rust 是 libp2p 网络协议栈的官方 Rust 语言实现。在 0.13.1 版本之前，当远程对端提供一个有效的、短生命周期的 libp2p TLS 证书，并故意延迟发送最终的 TLS 1.3 握手片段，直到该证书过期之后才发送时，libp2p-quic 在处理入站 QUIC 握手过程中可能会触发 panic（恐慌/异常中断）。 具体而言，在 Quinn 后握手升级（post-handshake upgrade）路径中， 文件在 函数中第二次调用了 函数，并对调用结果使用了 方法。由于再次执行了

CVSS 8.2 · High

Affected Version Matrix 1

VendorProduct Version RangeStatus
libp2p rust-libp2p < 0.13.1 affected
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I. Basic Information for CVE-2026-61544

Vulnerability Information
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Vulnerability Title
libp2p-quic: Remote panic via certificate expiry race during QUIC handshake
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
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
Source: CVE Program / CVE List V5
Vulnerability Type
未捕获的异常
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
libp2p rust-libp2p < 0.13.1 -

II. Public POCs for CVE-2026-61544

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III. Intelligence Information for CVE-2026-61544

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Patches & Fixes for CVE-2026-61544 (3)

Vendor Advisories for CVE-2026-61544 (1)

IV. Related Vulnerabilities

Same product: rust-libp2p
Same vendor: libp2p
Same weakness: CWE-248

V. Comments for CVE-2026-61544

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