CVE-2026-123804

CVSS 6.8 (medium) · published 2026-11-09

SuperTokens Core is an open source authentication server. From 7.0.0 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, createNewSession can resolve a primary user before unlinkAccounts detaches a login method and then insert the session after unlink has enumerated and revoked the existing sessions. A user who controls the linked login method can exploit this race to retain a signed, database-backed, refreshable session as the former primary identity after that method is unlinked; the session persists until expiry or explicit revocation. 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.

Weakness: CWE-362, CWE-613

Source: NVD CVE-2026-123804

References

• https://github.com/supertokens/supertokens-core/commit/182b39454ac44649cdef22d87f296a38a0b1a602
• https://github.com/supertokens/supertokens-core/commit/378e1157dc26232a518d2c360ee60cf93c2fd8a2
• https://github.com/supertokens/supertokens-core/commit/5aec64aca6d765cde491658210e6922e291742fd
• https://github.com/supertokens/supertokens-core/commit/b1c569ed59fffe16c2f657da1754abcae47d2761
• https://github.com/supertokens/supertokens-core/commit/b44f1e1418206f411e541501c2e5b9b147add0d9
• https://github.com/supertokens/supertokens-core/commit/bb6d5f8d1b79770e3cc37f214ba94c3e36e9c3b8
• https://github.com/supertokens/supertokens-core/commit/c0b7f5eda20840f63f6b0f171d22bd49a7a609a1
• https://github.com/supertokens/supertokens-core/commit/c8b48e843b323cd749dcb17b6b81c190e7882a43
• https://github.com/supertokens/supertokens-core/commit/c950a01794cf0983ebd62412976cb80756bf5dd0
• https://github.com/supertokens/supertokens-core/commit/d456dfbc02f2f7d68be7c05d876bdaa086f9a5b5

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