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TI-2026-05821 Aliases CVE-2026-6634GHSA-gqp3-hfc3-8q54

usememos UpdateInstanceSetting App.tsx memos_access_token improper authorization

Priority MEDIUM 57CWE-266Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
Privilege escalation, Security bypass
Confidentiality · integrity · availability
Low · Low · Low
Fix status
No fix listed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA and GitHub. Impact type from CWE-266 and CWE-285.

Summary

A weakness has been identified in usememos memos up to 0.22.1. This affects the function memos_access_token of the file src/App.tsx of the component UpdateInstanceSetting. This manipulation of the argument additionalStyle/additionalScript causes improper authorization. The attack is possible to be carried out remotely. The exploit has been made available to the public and could be used for attacks. The vendor was contacted early about this disclosure but did not respond in any way.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00252 16th percentileScored 2026-11-08
Public exploit Yes 1 exploit referenceTagged by the CNA
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
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
usememosmemos0.22.0; 0.22.1—No fix listedCNA
—github.com/usememos/memos (Go)up to 0.22.1—No fix listedGHSA-gqp3-hfc3-8q54
  • memos Vendorusememos Affected 0.22.0; 0.22.1 Fixed in — No fix listed CNA
  • github.com/usememos/memos (Go) Vendor— Affected up to 0.22.1 Fixed in — No fix listed GHSA-gqp3-hfc3-8q54

CPE names CNA · 1

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

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-6634
  2. 2026-10-03 Alias added: GHSA-gqp3-hfc3-8q54

References

Exploit 1

Advisory 2

Other 1

  • 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