CVE-2026-11586
By default, curl automatically responds to WebSocket PING frames. Because curl lacks an upper bound on memory allocation for unacknowledged frames, a malicious server can exhaust all available memory by flooding curl with rapid, sequential PING messages.
- Haxx Curl
- < 8.21.0
- CVSS 3.1
- 7.5 HIGH
- EPSS
- 0.5% (40th percentile)
- Weakness
- CWE-770
- NVD status
- Analyzed
- Published
- 2026-07-03
CVE-2026-11586 at NVD
No indexed exploits for CVE-2026-11586 yet
Our index is partial: it proves presence, never absence
No exploit for CVE-2026-11586 has been indexed yet. Our index is built from live traffic and upstream syncs, so this page can only say what it knows — not that no exploit exists.