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TI-2026-76930 Aliases CVE-2026-113601GHSA-599r-q6pw-w9jj

Missing authorization in Memos ActivityService exposes other users' activity

Priority LOW 24CWE-862Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
Security bypass
Confidentiality · integrity · availability
Low · None · None
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-862.

Summary

Memos before 0.27.0 by usememos contains a missing authorization flaw (CWE-862) in the ActivityService ListActivities and GetActivity API methods. An authenticated user with low privileges can enumerate sequential activity IDs and view activity records of all users, including activity on other users' private memos, which exposes creator IDs, timestamps and memo-comment references.

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

Description from the CNA

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00306 23rd percentileScored 2026-11-07
Fix Fixed memos (usememos): 0.27.0

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
usememosmemosbefore 0.27.00.27.0Patch availableCNA
  • memos Vendorusememos Affected before 0.27.0 Fixed in 0.27.0 Patch available CNA

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPEVersionsRoleVendor
cpe:2.3:a:usememos:memos:*:*:*:*:*:*:*:*——usememos
  • cpe:2.3:a:usememos:memos:*:*:*:*:*:*:*:* Versions — — ·usememos

Remediation

Upgrade usememos memos to version 0.27.0 or later, which fixes the flaw.

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

  • Fix · CNA memos (usememos) Fixed in 0.27.0

Timeline

  1. 2026-10-20 Threatist record created from CVE-2026-113601
  2. 2026-10-21 Alias added: GHSA-599r-q6pw-w9jj
  3. 2026-10-23 CISA SSVC decision points changed

References

Patch 1

Other 3

  • TI-2025-32234 The Memos application, up to version v0.24.3, allows for the embedding of markdown images… CVSS 3.1CRITICAL 9.8
  • TI-2025-16796 elestio memos v0.23.0 is vulnerable to Server-Side Request Forgery (SSRF) due to… CVSS 3.1CRITICAL 9.8
  • TI-2023-04328 Improper Access Control in usememos/memos CVSS 3.1CRITICAL 9.8
  • TI-2022-04459 Cross-site Scripting (XSS) - Stored in usememos/memos CVSS 3.1CRITICAL 9.0
  • TI-2022-04458 Cross-site Scripting (XSS) - Stored in usememos/memos CVSS 3.1CRITICAL 9.0
  • TI-2022-04283 Authorization Bypass Through User-Controlled Key in usememos/memos CVSS 3.1CRITICAL 9.8
See all 78 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences