Vulnerability · Published Oct 20, 2026 · Assigned by VulnCheck

CVE-2026-113601Memos before 0.27.0 Missing Authorization via ActivityService ListActivities/GetActivity

Medium 4.3

In plain English

A medium-severity missing authorization in memos from usememos. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 24% of all known vulnerabilities).

Severity (CVSS 3.1)4.3Medium

Exploit odds (30 days)0.3%top 76.5% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

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 products (as reported)

Vendor	Product	Versions
usememos	memos	0 – before 0.27.0

Weakness: CWE-862 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

References

https://github.com/usememos/memos/issues/5651 issue-tracking
https://github.com/usememos/memos/commit/04f239a2fc74f7090c779a6a7b8a08238fd31b88 patch
memos v0.27.0 Release Notes release-notes
https://github.com/usememos/memos/blob/v0.26.2/server/router/api/v1/activity_service.go technical-description
VulnCheck Advisory: Memos before 0.27.0 Missing Authorization via ActivityService ListActivities/GetActivity third-party-advisory