What’s Vulnerable › Vulnerabilities

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

• Severity: medium (CVSS 4.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-10-20 · updated 2026-10-23
• Weakness: CWE-862

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

• usememos/memos: before 0.27.0 — fixed in 0.27.0

How to fix

Upgrade to a fixed version: usememos/memos 0.27.0. Check the vendor advisory for mitigations.

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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