https://poc.intelseclab.com/tags/xquic/Latest proof-of-concept entries.Hugoen-usWed, 08 Jul 2026 00:00:00 +0000https://poc.intelseclab.com/pocs/network/2026-07-08_xring-xquic-qpack-ring-mem-resize-underflow/Wed, 08 Jul 2026 00:00:00 +0000https://poc.intelseclab.com/pocs/network/2026-07-08_xring-xquic-qpack-ring-mem-resize-underflow/Critical severity — network. Status: Weaponized (public PoC, unpatched at publication). Affects: [alibaba/xquic](https://github.com/alibaba/xquic) — QUIC/HTTP-3 library, used by Tengine and reportedly across Alibaba's cloud/CDN infrastructure (Taobao, AliPay). Tags: quic, http3, qpack, xquic, alibaba, tengine, ring-buffer, integer-underflow, heap-oob-read, memcpy, remote, unauthenticated, dos, no-cve.networkCriticalquichttp3qpackxquicalibabatenginering-bufferinteger-underflowheap-oob-readmemcpyremoteunauthenticateddosno-cve