CVE-2026-11586CWE-770denial-of-service
CVE-2026-11586
High · published July 3, 2026
What it is
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.
The record
Technical detail
- CVSS v3.1
- 7.5 · HIGH
- Vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- CVSS v4.0
- Not supplied
- EPSS
- 0.00609 · 48.5th percentile
- Weakness
- CWE-770 · Allocation of Resources Without Limits or Throttling
- Published
- 2026-07-03T11:16Z
Affected products (1)
| Product | Versions | Fixed in |
|---|
| haxx/curl | ≥ 8.16.0, < 8.21.0 | 8.21.0 |
References (3)
EPSS history
Timeline