Insufficient Token Revocation in Memos by UseMemos
CVE-2026-84203

8.6HIGH

Key Information:

Vendor

Usememos

Status
Memos
Vendor
CVE Published:
1 September 2026

What is CVE-2026-84203?

Versions 0.26.0 to 0.30.0 of Memos fail to properly revoke refresh tokens when a user changes their password. This oversight enables attackers with stolen refresh tokens to continue accessing user accounts by retrieving new access tokens through the RefreshToken RPC. By exploiting this flaw, attackers can circumvent the intended security measures designed to protect user accounts during password changes.

Affected Version(s)

memos 0.26.0 <= 0.30.0

References

https://github.com/usememos/memos
product
https://github.com/usememos/memos/blob/v0.30.0/server/rou...
technical-description
https://github.com/usememos/memos/blob/v0.30.0/server/aut...
technical-description

CVSS V4

Score:
8.6
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Michael Holmquist
.