CVE-2026-123803
SuperTokens Core: WebAuthn sign-in accepts a passkey across tenant boundaries
SuperTokens Core is an open source authentication server. From 10.1.0 until 11.0.9, 11.1.4, 11.2.4, 11.3.8, 11.4.8, 12.0.11, 12.1.2, 12.2.1, and 12.3.1, loadOptionsById_Transaction and getUserInfoByCredentialId_Transaction perform application-scoped WebAuthn lookups without constraining them to the requested tenant, and WebAuthN.signIn does not verify tenant membership. In a multi-tenant deployment using WebAuthn with a shared user pool, an ordinary user who possesses their own valid passkey in one tenant can submit its assertion to another tenant's sign-in endpoint in the same application and be authenticated there despite having no membership in the target tenant. This issue is fixed in versions 11.0.9, 11.1.4, 11.2.4, 11.3.8, 11.4.8, 12.0.11, 12.1.2, 12.2.1, and 12.3.1.
Fixes and workarounds
No remediation reported in collected sources.
Missing remediation information is not evidence that no patch exists.
Affected products and versions
| Product | Versions | Authority |
|---|---|---|
| supertokens-core supertokens |
>= 10.1.0, < 11.0.0 (affected) >= 11.0.0, < 11.0.9 (affected) >= 11.1.0, < 11.1.4 (affected) >= 11.2.0, < 11.2.4 (affected) >= 11.3.0, < 11.3.8 (affected) >= 11.4.0, < 11.4.8 (affected) >= 12.0.0, < 12.0.11 (affected) >= 12.1.0, < 12.1.2 (affected) >= 12.2.0, < 12.2.1 (affected) >= 12.3.0, < 12.3.1 (affected) |
CNA: GitHub_M |
Version ranges are source assertions. Check the vendor advisory and your installed configuration before determining exposure.
CVSS assessments
| Version / score | Vector | Authority |
|---|---|---|
| 3.1 / 8.1 high |
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N | CNA: GitHub_M |
Exploit evidence
No exploit evidence in collected sources. This is not proof of no exploitation.
References
- https://github.com/supertokens/supertokens-core/security/advisories/GHSA-6v34-w48w-44rcCNA: GitHub_M · x_refsource_CONFIRM
- https://github.com/supertokens/supertokens-core/commit/01ca34a06baa0d22db008f38c8eabd1f6695d9a6CNA: GitHub_M · x_refsource_MISC
- https://github.com/supertokens/supertokens-core/commit/030643edea5d69e0009ceeecbc5dd70be5c66186CNA: GitHub_M · x_refsource_MISC
- https://github.com/supertokens/supertokens-core/commit/1e3e4d9b25237a9c8fd77cbe0d4d0ecb360d8cd6CNA: GitHub_M · x_refsource_MISC
- https://github.com/supertokens/supertokens-core/commit/84492e38f9eb6db0cc338674ce5e94d1603bef08CNA: GitHub_M · x_refsource_MISC
- https://github.com/supertokens/supertokens-core/commit/982d420a5ac29d5e362eaf39169a7a9f5339abebCNA: GitHub_M · x_refsource_MISC
- https://github.com/supertokens/supertokens-core/commit/a3d033022effb00ccf0c4ec6ca77c36eb1a24617CNA: GitHub_M · x_refsource_MISC
- https://github.com/supertokens/supertokens-core/commit/ad768c1925e245930e5fbf9441452d85564de91dCNA: GitHub_M · x_refsource_MISC
- https://github.com/supertokens/supertokens-core/commit/b933b6c9b4495e47a8b3efeb5a70e9d014777320CNA: GitHub_M · x_refsource_MISC
- https://github.com/supertokens/supertokens-core/commit/e19d173f47658d036685d3020e18819c5f3690b7CNA: GitHub_M · x_refsource_MISC
- https://github.com/supertokens/supertokens-core/releases/tag/v11.0.9CNA: GitHub_M · x_refsource_MISC
- https://github.com/supertokens/supertokens-core/releases/tag/v11.1.4CNA: GitHub_M · x_refsource_MISC
- https://github.com/supertokens/supertokens-core/releases/tag/v11.2.4CNA: GitHub_M · x_refsource_MISC
- https://github.com/supertokens/supertokens-core/releases/tag/v11.3.8CNA: GitHub_M · x_refsource_MISC
- https://github.com/supertokens/supertokens-core/releases/tag/v12.0.11CNA: GitHub_M · x_refsource_MISC
- https://github.com/supertokens/supertokens-core/releases/tag/v12.1.2CNA: GitHub_M · x_refsource_MISC
- https://github.com/supertokens/supertokens-core/releases/tag/v12.2.1CNA: GitHub_M · x_refsource_MISC
- https://github.com/supertokens/supertokens-core/releases/tag/v12.3.1CNA: GitHub_M · x_refsource_MISC
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