CVE-2026-63203 Logto - Broken Access Control

Logto 1.31.0 to 1.42.0 contains an information disclosure vulnerability caused by missing scope validation in Account API handlers, letting attackers with same-user openid tokens retrieve stored SSO provider access tokens, exploit requires federated token-set storage enabled and user authenticated via supported connector.

CVSS base score 7.6 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Required
EPSS
0.31% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Broken Access Control
Impact
Information Disclosure
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:L/A:N
Published
24 September 2026
Updated
15 October 2026
Weakness
CWE-862

Vendor fix

Update to version 1.42.0 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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