SB2026090469 - MongoDB Enterprise Advanced with IBM update for Handlebars

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Main Vulnerability Database SB2026090469

SB2026090469 - MongoDB Enterprise Advanced with IBM update for Handlebars

Published: September 4, 2026

Security Bulletin ID SB2026090469
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Remote access
Highest impact Data manipulation

Breakdown by Severity

Medium 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Cross-site scripting (CVE-ID: CVE-2026-33916)

CWE-ID: CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

CVSSv4: 2.1 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N]


The vulnerability allows a remote attacker to execute arbitrary script code in a victim's browser.

The vulnerability exists due to improper neutralization of input during web page generation in resolvePartial() and invokePartial() in the Handlebars runtime when rendering a partial whose name is resolved through a polluted prototype chain. A remote attacker can pollute Object.prototype with a string value matching a partial reference to execute arbitrary script code in a victim's browser.

Exploitation requires a prototype pollution condition in the target application and user interaction to render a template that references the attacker-chosen partial name. The injected partial content is rendered without HTML escaping, which can result in reflected or stored cross-site scripting.


Remediation

Install update from vendor's website.

References