What is CVE-2026-12707?

CVE-2026-12707 is a high-severity vulnerability in Cloudflare Quiche, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 7.5/10. Published 2026-07-14.

How severe is CVE-2026-12707?

High severity. CVSS v3 base score is 7.5 out of 10.

Resource exhaustion in Cloudflare Quiche

CVE-2026-12707

Summary Cloudflare quiche was discovered to be vulnerable to memory resource exhaustion due to unbounded queuing of post-handshake client migration events. Impact quiche supports the connection migration features described in Sect…

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

Affected products

Cloudflare Quiche — versions 0.15.0

Weakness classification (CWE)

CWE-770 — Allocation of Resources Without Limits or Throttling

References

cna@cloudflare.com

Frequently asked questions

What is CVE-2026-12707?: CVE-2026-12707 is a high-severity vulnerability in Cloudflare Quiche, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 7.5/10. Published 2026-07-14.
How severe is CVE-2026-12707?: High severity. CVSS v3 base score is 7.5 out of 10.