CVE-2026-84203 Memos 0.26.0 through 0.30.0 Insufficient Session Expiration on Password Change
Attackers with stolen refresh tokens maintain account access after password changes because Memos fails to revoke existing sessions.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-84203?
CVE-2026-84203 is a high-severity authentication bypass vulnerability in usememos memos, published on 1 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official 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.
Weakness: CWE-613
Which versions are affected by CVE-2026-84203?
How do I fix CVE-2026-84203?
No fix has been published for CVE-2026-84203 yet. Limit exposure of the affected software until one is available.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2026-84203 being exploited?
There is no known exploitation of CVE-2026-84203 in the wild and no public exploit code.
Sources
Also known as GHSA-47v8-26mf-hw38.