Cloudflare
Cloudflare Quiche: vulnerabilities and CVEs
Cloudflare Quiche has 9 published vulnerabilities, 3 of them in the last 12 months. 0 are rated critical and 0 are listed by CISA as actively exploited.
CVEs9
Last 12 months3
Critical0
Actively exploited0
All vulnerabilities in the catalogue →⭐ Follow this technology
Latest vulnerabilities
| CVE | Severity | EPSS | Active exploitation | Published | Description |
|---|---|---|---|---|---|
| CVE-2026-12707 | High (7.5) | 0.44% | — | Jul 14, 2026 | 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… |
| CVE-2026-12523 | High (7.5) | 0.53% | — | Jul 14, 2026 | 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. Impact HTTP/3 defines multiple frame types to support HTTP… |
| CVE-2026-11941 | Medium (5.6) | 0.25% | — | Jun 19, 2026 | Cloudflare Quiche was affected by 2 use-after-free vulnerabilities in the connection ID iterator FFI functions. The “quiche_connection_id_iter_next” and “quiche_conn_retired_scid_next” functions would return a pointer… |
| CVE-2025-7054 | High (8.7) | 0.40% | — | Aug 7, 2025 | Cloudflare quiche was discovered to be vulnerable to an infinite loop when sending packets containing RETIRE_CONNECTION_ID frames. QUIC connections possess a set of connection identifiers (IDs); see Section 5.1 of RFC… |
| CVE-2025-4821 | High (7.5) | 0.94% | — | Jun 18, 2025 | Impact Cloudflare quiche was discovered to be vulnerable to incorrect congestion window growth, which could cause it to send data at a rate faster than the path might actually support. An unauthenticated remote attacker… |
| CVE-2025-4820 | Medium (5.3) | 0.86% | — | Jun 18, 2025 | Impact Cloudflare quiche was discovered to be vulnerable to incorrect congestion window growth, which could cause it to send data at a rate faster than the path might actually support. An unauthenticated remote attacker… |
| CVE-2024-1765 | High (7.5) | 1.2% | — | Mar 12, 2024 | Cloudflare Quiche (through version 0.19.1/0.20.0) was affected by an unlimited resource allocation vulnerability causing rapid increase of memory usage of the system running quiche server or client. A remote attacker… |
| CVE-2024-1410 | Medium (5.3) | 0.66% | — | Mar 12, 2024 | Cloudflare quiche was discovered to be vulnerable to unbounded storage of information related to connection ID retirement, which could lead to excessive resource consumption. Each QUIC connection possesses a set of… |
| CVE-2023-6193 | Medium (5.3) | 0.76% | — | Dec 12, 2023 | quiche v. 0.15.0 through 0.19.0 was discovered to be vulnerable to unbounded queuing of path validation messages, which could lead to excessive resource consumption. QUIC path validation (RFC 9000 Section 8.2) requires… |