CVE-2026-84203: Insufficient Session Expiration in usememos memos
Description
Memos versions 0.26.0 through 0.30.0 fail to revoke refresh tokens when a user changes their password, allowing attackers to maintain account access. An attacker with a stolen refresh token can call the RefreshToken RPC to obtain new access tokens and rotate the refresh token indefinitely, bypassing the password change security measure.
CVSS v4.0
Score 8.6high
Affected software
usememos
memos
Run on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-84203 describes an insufficient session expiration vulnerability in usememos memos versions 0.26.0 through 0.30.0. When a user changes their password, the system fails to revoke existing refresh tokens. An attacker possessing a stolen refresh token can exploit this by calling the RefreshToken RPC repeatedly to obtain new access tokens and rotate the refresh token indefinitely, effectively bypassing the password change security measure.
Potential Impact
An attacker with a stolen refresh token can maintain unauthorized access to a user's account even after the user changes their password. This undermines the security expectation that password changes invalidate existing sessions, potentially leading to prolonged unauthorized access and account compromise.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, users and administrators should be aware that changing passwords does not revoke refresh tokens in affected versions. Monitoring for suspicious token refresh activity may help detect exploitation attempts.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- VulnCheck
- Date Reserved
- 2026-09-01T11:03:27.973Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 6a96f4d7acd9273b49e76234
Added to database: 09/01/2026, 15:52:55 UTC
Last enriched: 09/07/2026, 14:27:49 UTC
Last updated: 10/17/2026, 06:48:21 UTC
Views: 73
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.