CVE-2026-84203: Memos 0.26.0 through 0.30.0 Insufficient Session Expiration on Password Change

Severity: high (CVSS 8.1 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-09-01 · updated 2026-09-08
Weakness: CWE-613

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.

Affected products

usememos/memos: from 0.26.0 through 0.30.0

References

https://github.com/usememos/memos
https://github.com/usememos/memos/blob/v0.30.0/server/auth/authenticator.go
https://github.com/usememos/memos/blob/v0.30.0/server/router/api/v1/user_service.go
https://www.vulncheck.com/advisories/memos-0.26.0-through-0.30.0-insufficient-session-expiration-on-password-change

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