CVEvulnerability
CVE-2026-11586
7.5 HIGH
Official page ↗
- Status
- Modified
- Published
- 2026-07-03
- Last modified
- 2026-09-15
- Assigner
- 2499f714-1537-4658-8207-48ae4bb9eae9
- CVSS 3.1 (134c704f-9b21-4f2e-91b3-4a467353bcc0)
- 7.5 HIGH — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- Weaknesses
- CWE-770
Description
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.
Affected configurations
• haxx curl (>= 8.16.0 < 8.21.0)
Related
Weakness · CWE (1)
- CWE-770 Allocation of Resources Without Limits or Throttling weakness
References
- https://curl.se/docs/CVE-2026-11586.html Patch, Vendor Advisory
- https://curl.se/docs/CVE-2026-11586.json Vendor Advisory
- https://hackerone.com/reports/3788931 Exploit, Issue Tracking, Third Party Advisory