| Package | Affected versions | Patched versions |
|---|---|---|
| curl | ≥ 8.16.0, < 8.21.0 | 8.21.0 |
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.
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