CVE-2026-84203
Received Received - Intake

Memos Password Change Bypass via Refresh Token

Publication date: 2026-09-01

Last updated on: 2026-09-01

Assigner: VulnCheck

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.

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Meta Information

Published
2026-09-01
Last Modified
2026-09-01
Generated
2026-09-01
AI Q&A
2026-09-01
EPSS Evaluated
N/A
NVD
CVE-2026-84203
EUVD
EUVD-2026-69290

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
usememos memos From 0.26.0 (inc) to 0.30.0 (inc)

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-613 According to WASC, "Insufficient Session Expiration is when a web site permits an attacker to reuse old session credentials or session IDs for authorization."

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Executive Summary

Memos versions 0.26.0 through 0.30.0 do not revoke refresh tokens when a user changes their password. This allows attackers with a stolen refresh token to repeatedly call the RefreshToken RPC to obtain new access tokens indefinitely, bypassing the password change security measure.

Detection Guidance

Check Memos server logs for repeated RefreshToken RPC calls from the same IP or user agent. Inspect database entries for refresh tokens that remain valid after password changes. Use network monitoring tools to detect unusual token refresh activity.

Impact Analysis

Attackers can maintain unauthorized access to user accounts even after passwords are changed. This could lead to data theft, unauthorized actions, or persistent account compromise if refresh tokens are stolen.

Compliance Impact

This vulnerability may violate compliance requirements that mandate timely revocation of access upon password changes, such as GDPR's data protection principles or HIPAA's access control rules. It could lead to unauthorized data exposure.

Mitigation Strategies

Upgrade Memos to the latest version beyond 0.30.0. Revoke all existing refresh tokens manually via database queries. Monitor for unauthorized access attempts and enforce password changes for all users.

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