Allocation of Resources Without Limits or Throttling in Crow - #VU147368
Published: September 8, 2026
Vulnerability identifier: #VU147368
CSH Severity: Medium
CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: N/A
CWE-ID: CWE-770
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to allocation of resources without limits or throttling in WebSocket fragmented-message handling when processing fragmented WebSocket messages. A remote attacker can send an oversized message as individually permitted fragments to cause a denial of service.
The issue affects applications that use max_payload() or websocket_max_payload() as a resource-control boundary.
Affected software
Crow
Remediation
Install security update from vendor's website.
Crow - update to 1.3.4