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 (3)
Core 3
Core References
Scores
CVSS v3
7.5
EPSS
0.0086
EPSS Percentile
54.3%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
yes
Technical Impact
partial
Details
CWE
CWE-770
Status
published
Products (6)
curl/curl
8.16.0
curl/curl
8.17.0
curl/curl
8.18.0
curl/curl
8.19.0
curl/curl
8.20.0
haxx/curl
8.16.0 - 8.21.0
Published
Jul 03, 2026
Tracked Since
Jul 03, 2026