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9.6
CVE-2026-37171: SuperTokens Core lets users see other tenants' data
CVE-2026-37171 · published 2 months ago
Summary
If you run SuperTokens Core version 6.0.0 through 11.4.0, a logged‑in user from one customer group can view and use sessions, data, and functions belonging to a different group. This breaks the expected privacy between separate customers. Upgrade to a newer release or apply the vendor's patch that restores proper separation.
What to do
The CVE record does not list a fixed version. Check the vendor's site or the advisory links below - a fix may already be released.
Affected software
| Vendor | Product | Affected versions |
|---|---|---|
| supertokens | supertokens |
>= 6.0.0, <= 11.4.0 cpe:2.3:a:supertokens:supertokens:*:*:*:*:*:*:*:* |
Original advisory text
A lack of tenant separation in SuperTokens Inc. SuperTokens Core v6.0.0 to v11.4.0 allows an authenticated party in one tenant to access sessions, data, and endpoints of another tenant.
A lack of tenant separation in SuperTokens Inc. SuperTokens Core v6.0.0 to v11.4.0 allows an authenticated party in one tenant to access sessions, data, and endpoints of another tenant.
References
- https://whitenbaker.com/supertokens-core-multitenant-advisory Exploit Third Party Advisory
- http://www.openwall.com/lists/oss-security/2026/09/09/4 Mailing List Third Party Advisory
- https://whitenbaker.com/supertokens-core-multitenant-advisory/ Exploit Third Party Advisory
Internet-facing
60 days
Internal
At next upgrade
- Not known to be exploited
- Needs hands-on effort to exploit
- Gives an attacker partial control
Severity
9.6
Critical
Type
CWE-863Incorrect Authorization
Timeline
Published7 Aug 2026
Updated31 Oct 2026
First seen7 Aug 2026
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