CVE-2026-109149: Uncontrolled Memory Allocation in beautifier js-beautify
Description
CVE-2026-109149 is a medium severity vulnerability in the js-beautify library (versions 1.15.0, 1.15.1, 2.0.0, 2.0.1, 2.0.2, and 2.0.3) that allows remote attackers to cause uncontrolled memory allocation via an unknown function. The vendor has not responded to disclosure requests, and no patch or mitigation guidance is currently available.
CVSS v4.0
Score 6.9medium
Affected software
beautifier
js-beautify
pkg:npm/js-beautifycpe:2.3:a:beautifier:js-beautify:*:*:*:*:*:*:*:*Run on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability in js-beautify up to versions 1.15.1 and 2.0.3 involves uncontrolled memory allocation triggered by an unknown function when manipulated remotely. The issue could lead to resource exhaustion or denial of service. The vendor was contacted but did not provide any response or patch. The CVSS 4.0 score is 6.9 (medium severity) with an attack vector of network, low attack complexity, no privileges or user interaction required, and limited impact on availability.
Potential Impact
An attacker can remotely trigger uncontrolled memory allocation in affected versions of js-beautify, potentially causing denial of service or resource exhaustion on the target system. There is no evidence of code execution or data compromise from the provided data.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Since the vendor has not responded and no patch links are available, users should monitor official sources for updates and consider limiting exposure to untrusted inputs processed by js-beautify.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- VulDB
- Date Reserved
- 2026-10-12T11:36:30.201Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 6acdfe992cdf04f6564c8879
Added to database: 10/13/2026, 09:49:13 UTC
Last enriched: 10/13/2026, 10:18:55 UTC
Last updated: 10/13/2026, 18:57:34 UTC
Views: 12
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