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HIGH

CVE-2026-84203

CVSS v3

8.1

HIGH

EPSS Score

0.4 %

exploit probability, as of 2026-09-29

CISA KEV

No

known exploited

Exploitation

—

SSVC status

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.

Technical details

Published
2026-09-01
Last Modified
2026-09-01

Frequently asked questions

What is CVE-2026-84203?

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.

Is CVE-2026-84203 actively exploited?

Active exploitation of CVE-2026-84203 has not been confirmed. Its EPSS score was 0.4% on 2026-09-29, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2026-84203?

CVE-2026-84203 has a CVSS v3 base score of 8.1 (HIGH severity).

Is CVE-2026-84203 affecting your environment?

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