Notepad++ Vulnerability (CVE-2026-3008) Exposes Systems to DoS and Memory Leaks
A critical vulnerability, CVE-2026-3008, has been identified in Notepad++, the widely used text and source code editor. The flaw, a string injection issue in the FindInFiles functionality, allows remote attackers to crash the application or extract sensitive memory address data from affected systems.
The vulnerability stems from improper handling of the "find-result-hits" field in Notepad++’s configuration file, where a %s format specifier can trigger unintended behavior during search operations. This improper memory handling could enable denial-of-service (DoS) attacks or expose memory contents, posing a risk to users relying on the tool for development or administrative tasks.
The issue affects all versions of Notepad++ and highlights the potential security risks in even trusted, lightweight utilities when format string and memory management flaws are exploited. No active exploitation has been reported at this time, but users are advised to monitor for patches or mitigations from the vendor.
Source: https://www.linkedin.com/feed/update/urn:li:activity:7454562462550425600
Notepad++ TPRM report: https://www.rankiteo.com/company/notepad-plus-plus
"id": "not1777307037",
"linkid": "notepad-plus-plus",
"type": "Vulnerability",
"date": "4/2026",
"severity": "25",
"impact": "1",
"explanation": "Attack without any consequences"{'affected_entities': [{'customers_affected': 'All users of Notepad++',
'industry': 'Software Development',
'name': 'Notepad++',
'type': 'Software'}],
'attack_vector': 'Remote',
'data_breach': {'sensitivity_of_data': 'Sensitive',
'type_of_data_compromised': 'Memory address data'},
'description': 'A critical vulnerability, CVE-2026-3008, has been identified '
'in Notepad++, the widely used text and source code editor. '
'The flaw, a string injection issue in the FindInFiles '
'functionality, allows remote attackers to crash the '
'application or extract sensitive memory address data from '
'affected systems. The vulnerability stems from improper '
"handling of the 'find-result-hits' field in Notepad++’s "
'configuration file, where a %s format specifier can trigger '
'unintended behavior during search operations.',
'impact': {'data_compromised': 'Sensitive memory address data',
'operational_impact': 'Application crash (Denial-of-Service)',
'systems_affected': 'Notepad++ application'},
'post_incident_analysis': {'root_causes': 'Improper handling of the '
"'find-result-hits' field in "
'Notepad++’s configuration file, '
'leading to string injection and '
'memory management flaws.'},
'recommendations': 'Users are advised to monitor for patches or mitigations '
'from the vendor.',
'response': {'remediation_measures': 'Monitor for patches or mitigations from '
'the vendor'},
'title': 'Notepad++ Vulnerability (CVE-2026-3008) Exposes Systems to DoS and '
'Memory Leaks',
'type': 'Vulnerability',
'vulnerability_exploited': 'CVE-2026-3008 (String injection in FindInFiles '
'functionality)'}