---
id: CVE-2026-113601
title: >-
  Memos before 0.27.0 Missing Authorization via ActivityService
  ListActivities/GetActivity
summary: >-
  Memos before 0.27.0 contains a missing authorization vulnerability in the
  ActivityService ListActivities and GetActivity API methods that allows
  authenticated users to view all users' activity records. Low-privileged
  attackers can enumer…
severity: medium
cvss: 4.3
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N'
cvssSource: cna
cwe:
  - CWE-862
vendor: usememos
product: memos
affected:
  - memos < 0.27.0
published: '2026-10-20'
updated: '2026-10-20'
sourceUpdated: '2026-10-20T15:40:28.941Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-113601'
references:
  - url: 'https://github.com/usememos/memos/issues/5651'
  - url: >-
      https://github.com/usememos/memos/commit/04f239a2fc74f7090c779a6a7b8a08238fd31b88
  - url: 'https://github.com/usememos/memos/releases/tag/v0.27.0'
    label: memos v0.27.0 Release Notes
  - url: >-
      https://github.com/usememos/memos/blob/v0.26.2/server/router/api/v1/activity_service.go
  - url: >-
      https://www.vulncheck.com/advisories/memos-before-0.27.0-missing-authorization-via-activityservice-listactivities-getactivity
    label: >-
      VulnCheck Advisory: Memos before 0.27.0 Missing Authorization via
      ActivityService ListActivities/GetActivity
tags:
  - cve.org
ingestedAt: '2026-10-20T16:10:53.303Z'
---

## Overview

Memos before 0.27.0 contains a missing authorization vulnerability in the ActivityService ListActivities and GetActivity API methods that allows authenticated users to view all users' activity records. Low-privileged attackers can enumerate sequential activity IDs to obtain creator IDs, timestamps, and memo-comment references, including activity on other users' private memos.

## Affected

- `memos < 0.27.0`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.