SB2026090470 - MongoDB Enterprise Advanced with IBM update for fast-xml-parser

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Main Vulnerability Database SB2026090470

SB2026090470 - MongoDB Enterprise Advanced with IBM update for fast-xml-parser

Published: September 4, 2026

Security Bulletin ID SB2026090470
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Remote access
Highest impact Denial of service

Breakdown by Severity

Medium 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Improper Validation of Specified Quantity in Input (CVE-ID: CVE-2026-33349)

CWE-ID: CWE-1284 - Improper Validation of Specified Quantity in Input

CVSSv4: 8.2 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]


The vulnerability allows a remote attacker to cause a denial of service.

The vulnerability exists due to improper validation of specified quantity in input in DocTypeReader when parsing XML input with entity processing limits set to 0. A remote attacker can supply a specially crafted XML document with many large entity definitions to cause a denial of service.

Only applications that explicitly set maxEntityCount or maxEntitySize to 0 are affected. The default configuration is not affected, and configurations with entity processing disabled are not affected.


Remediation

Install update from vendor's website.

References