CVE-2026-6634

MEDIUM 6.3

usememos UpdateInstanceSetting App.tsx memos_access_token improper authorization

CVSS Score

6.3

EPSS Score

0.0%

EPSS Percentile

0th

A weakness has been identified in usememos memos up to 0.22.1. This affects the function memos_access_token of the file src/App.tsx of the component UpdateInstanceSetting. This manipulation of the argument additionalStyle/additionalScript causes improper authorization. The attack is possible to be carried out remotely. The exploit has been made available to the public and could be used for attacks. The vendor was contacted early about this disclosure but did not respond in any way.

CWE	CWE-285 CWE-266
Vendor	usememos
Product	memos
Published	Apr 20, 2026

Stay Ahead of the Next One

Get instant alerts for usememos memos

Be the first to know when new medium vulnerabilities affecting usememos memos are published — delivered to Slack, Telegram or Discord.

Get Free Alerts → Free · No credit card · 60 sec setup

CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Scope

Confidentiality

Integrity

Availability

Affected Versions

usememos / memos

0.22.0 0.22.1

References

NVD ↗ CVE.org ↗ EPSS Data ↗

vuldb.com: https://vuldb.com/vuln/358268 vuldb.com: https://vuldb.com/vuln/358268/cti vuldb.com: https://vuldb.com/submit/793432 github.com: https://github.com/Dave-gilmore-aus/security-advisories/blob/main/usememos-security-advisory

Credits

🔍 davidgilmore (VulDB User) VulDB CNA Team