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CVE PROGRAM SOURCE RECORD7.5 High

CVE-2025-5399

WebSocket endless loop

Description

Due to a mistake in libcurl's WebSocket code, a malicious server can send a particularly crafted packet which makes libcurl get trapped in an endless busy-loop. There is no other way for the application to escape or exit this loop other than killing the thread/process. This might be used to DoS libcurl-using application.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

curl curl

Default version status: unaffected

  • 8.14.0 to ≤ 8.14.0affected
  • 8.13.0 to ≤ 8.13.0affected

References