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CVE-2026-6634— usememos UpdateInstanceSetting App.tsx memos_access_token improper authorization

Quick assessment

Affected
usememos memos
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Memos是Memos开源的一个具有知识管理和社交功能的开源自托管备忘录中心。 Memos 0.22.1及之前版本存在安全漏洞，该漏洞源于对文件src/App.tsx中UpdateInstanceSetting组件memos_access_token函数的参数additionalStyle/additionalScript操作不当，可能导致授权不当。

CVSS 6.3 · Medium EPSS 0.35% · P26
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I. Basic Information for CVE-2026-6634

Vulnerability Information
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Vulnerability Title
usememos UpdateInstanceSetting App.tsx memos_access_token improper authorization
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
授权机制不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
Memos 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Memos是Memos开源的一个具有知识管理和社交功能的开源自托管备忘录中心。 Memos 0.22.1及之前版本存在安全漏洞，该漏洞源于对文件src/App.tsx中UpdateInstanceSetting组件memos_access_token函数的参数additionalStyle/additionalScript操作不当，可能导致授权不当。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
usememos memos 0.22.0 cpe:2.3:a:usememos:memos:*:*:*:*:*:*:*:*

II. Public POCs for CVE-2026-6634

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III. Intelligence Information for CVE-2026-6634

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Vendor Advisories for CVE-2026-6634 (2)

Other References for CVE-2026-6634 (1)

IV. Related Vulnerabilities

Same product: memos
Same vendor: usememos
Same weakness: CWE-285

V. Comments for CVE-2026-6634

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