CVE-2026-113601

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.

CVSS 4.0

5.3CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N

CVSS 3.1

4.3CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

EPSS

0.3% chance of exploitation in the next 30 days; higher than 23% of CVEs (scores of 2026-10-25)

CWE

CWE-862

Published

2026-10-20

Modified

2026-10-23

Record from

the NVD, synced 2026-10-23

References

• https://github.com/usememos/memos/blob/v0.26.2/server/router/api/v1/activity_service.go
• https://github.com/usememos/memos/commit/04f239a2fc74f7090c779a6a7b8a08238fd31b88
• https://github.com/usememos/memos/issues/5651
• https://github.com/usememos/memos/releases/tag/v0.27.0
• https://www.vulncheck.com/advisories/memos-before-0.27.0-missing-authorization-via-activityservice-listactivities-getactivity

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