SB2026110210 - Allocation of Resources Without Limits or Throttling in websockets

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Main Vulnerability Database SB2026110210

SB2026110210 - Allocation of Resources Without Limits or Throttling in websockets

Published: November 2, 2026

Security Bulletin ID SB2026110210
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Remote access
Highest impact Partial DoS

Breakdown by Severity

Medium 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Allocation of Resources Without Limits or Throttling (CVE-ID: N/A)

CWE-ID: CWE-770 - Allocation of Resources Without Limits or Throttling

CVSSv4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]


The vulnerability allows a remote attacker to cause a denial of service by exhausting process memory.

The vulnerability exists due to allocation of resources without limits in websockets message reassembly when receiving an unfinished fragmented message through recv(). Payload-size limits do not account for zero-length fragments, and frame objects accumulate outside the flow-controlled queue. A remote attacker can start a fragmented message and continuously send valid zero-length, non-final continuation frames to exhaust memory in a receiving server or in a client connected to an attacker-controlled server.


Remediation

Install update from vendor's website.

References