Description
Macaron Notes 5.5 contains a denial of service vulnerability that allows attackers to crash the application by creating notes with excessively long character strings. Attackers can generate a payload containing 350000 repeated characters and paste it into a note field to trigger application crash and stop functionality.
Published: 2026-05-16
Score: 8.7 High
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

No vendor fix or workaround currently provided.

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Tracking

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Advisories

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History

Mon, 18 May 2026 17:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Sun, 17 May 2026 18:00:00 +0000

Type Values Removed Values Added
First Time appeared Macaron-notes-great-notebook
Macaron-notes-great-notebook macaron Notes Gear Notebook
Vendors & Products Macaron-notes-great-notebook
Macaron-notes-great-notebook macaron Notes Gear Notebook

Sat, 16 May 2026 15:45:00 +0000

Type Values Removed Values Added
Description Macaron Notes 5.5 contains a denial of service vulnerability that allows attackers to crash the application by creating notes with excessively long character strings. Attackers can generate a payload containing 350000 repeated characters and paste it into a note field to trigger application crash and stop functionality.
Title Macaron Notes 5.5 Denial of Service via Buffer Overflow
Weaknesses CWE-789
References
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'}

cvssV4_0

{'score': 8.7, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N'}


Subscriptions

Macaron-notes-great-notebook Macaron Notes Gear Notebook
cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2026-05-25T23:41:18.524Z

Reserved: 2026-05-16T14:30:32.190Z

Link: CVE-2021-47970

cve-icon Vulnrichment

Updated: 2026-05-18T16:58:13.961Z

cve-icon NVD

Status : Deferred

Published: 2026-05-16T16:16:22.330

Modified: 2026-06-17T04:18:51.177

Link: CVE-2021-47970

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-05-17T17:00:39Z

Weaknesses