CVE-2021-47970

Macaron Notes 5.5 Denial of Service via Buffer Overflow

Published May 16, 2026 CVSS 4.0 · 8.7 High EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
First Time appeared Go-macaron
Go-macaron macaron
CPEs cpe:2.3:a:go-macaron:macaron:5.5:*:*:*:*:*:*:*
Vendors & Products Go-macaron
Go-macaron macaron
Type Values Removed Values Added
Metrics ssvc

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

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
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'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
VulnCheck
Published
Updated
Jul 28, 2026, 1:47 AM
Reserved
May 16, 2026, 2:30 PM
Status
Deferred
Published
May 16, 2026, 4:16 PM
Modified
Jun 17, 2026, 4:18 AM