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Signals Exploited in the wild (KEV) 0 Patch available 2 No fix listed 0 Has CVE 2

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Requirements No authentication 2 No user interaction 2

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Weakness (CWE) CWE-400 Uncontrolled Resource Consumption 1 CWE-770 Allocation of Resources Without Limits or Throttling 1

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Release: Cloudflare quiche 0.29.3 × Clear all filters

TI-2026-10747 CVE-2026-12523

Resource exhaustion in quiche HTTP/3 and QPACK layers

Priority MEDIUM 40

Summary Cloudflare quiche's HTTP/3 layer was discovered to be vulnerable to resource exhaustion (i.e., memory) by means of specially crafted HTTP/3 frames.

CVSS 3.1HIGH 7.5· Network · No auth · No interaction · EPSS 0.00532 · Published 2026-07-14 · Fixed in 0.29.3 CWE-400

TI-2026-10866 CVE-2026-12707

Unbounded path event queue growth in quiche via peer-driven source connection ID rotation

Priority LOW 39

Summary Cloudflare quiche was discovered to be vulnerable to memory resource exhaustion due to unbounded queuing of post-handshake client migration events.

CVSS 3.1HIGH 7.5· Network · No auth · No interaction · EPSS 0.00441 · Published 2026-07-14 · Fixed in 0.29.3 CWE-770

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