SuperTokens Core: WebAuthn sign-in accepts a passkey across tenant boundaries

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-123803
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-11-09 19:16:47 UTC
Updated2026-11-09 19:16:47 UTC
DescriptionSuperTokens 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.

Risk And Classification

Primary CVSS: v3.1 8.1 HIGH from [email protected]

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N

Problem Types: CWE-863 | CWE-1220 | CWE-863 CWE-863: Incorrect Authorization | CWE-1220 CWE-1220: Insufficient Granularity of Access Control

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary8.1HIGHCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
3.1CNADECLARED8.1HIGHCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
None

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Supertokens Supertokens-core affected >= 10.1.0, < 11.0.0 Not specified
CNA Supertokens Supertokens-core affected >= 11.0.0, < 11.0.9 Not specified
CNA Supertokens Supertokens-core affected >= 11.1.0, < 11.1.4 Not specified
CNA Supertokens Supertokens-core affected >= 11.2.0, < 11.2.4 Not specified
CNA Supertokens Supertokens-core affected >= 11.3.0, < 11.3.8 Not specified
CNA Supertokens Supertokens-core affected >= 11.4.0, < 11.4.8 Not specified
CNA Supertokens Supertokens-core affected >= 12.0.0, < 12.0.11 Not specified
CNA Supertokens Supertokens-core affected >= 12.1.0, < 12.1.2 Not specified
CNA Supertokens Supertokens-core affected >= 12.2.0, < 12.2.1 Not specified
CNA Supertokens Supertokens-core affected >= 12.3.0, < 12.3.1 Not specified

References

ReferenceSourceLinkTags
github.com/supertokens/supertokens-core/releases/tag/v12.2.1 [email protected] github.com
github.com/supertokens/supertokens-core/releases/tag/v12.3.1 [email protected] github.com
github.com/supertokens/supertokens-core/commit/030643edea5d69e0009ceeecb... [email protected] github.com
github.com/supertokens/supertokens-core/releases/tag/v12.0.11 [email protected] github.com
github.com/supertokens/supertokens-core/commit/982d420a5ac29d5e362eaf391... [email protected] github.com
github.com/supertokens/supertokens-core/commit/1e3e4d9b25237a9c8fd77cbe0... [email protected] github.com
github.com/supertokens/supertokens-core/releases/tag/v11.0.9 [email protected] github.com
github.com/supertokens/supertokens-core/releases/tag/v11.1.4 [email protected] github.com
github.com/supertokens/supertokens-core/releases/tag/v11.2.4 [email protected] github.com
github.com/supertokens/supertokens-core/security/advisories/GHSA-6v34-w4... [email protected] github.com
github.com/supertokens/supertokens-core/commit/e19d173f47658d036685d3020... [email protected] github.com
github.com/supertokens/supertokens-core/releases/tag/v11.3.8 [email protected] github.com
github.com/supertokens/supertokens-core/commit/a3d033022effb00ccf0c4ec6c... [email protected] github.com
github.com/supertokens/supertokens-core/releases/tag/v12.1.2 [email protected] github.com
github.com/supertokens/supertokens-core/commit/b933b6c9b4495e47a8b3efeb5... [email protected] github.com
github.com/supertokens/supertokens-core/commit/01ca34a06baa0d22db008f38c... [email protected] github.com
github.com/supertokens/supertokens-core/commit/ad768c1925e245930e5fbf944... [email protected] github.com
github.com/supertokens/supertokens-core/commit/84492e38f9eb6db0cc338674c... [email protected] github.com
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