CVE-2026-11586

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.

References

• https://curl.se/docs/CVE-2026-11586.html
• https://curl.se/docs/CVE-2026-11586.json
• https://hackerone.com/reports/3788931