CVE-2026-123804 SuperTokens Core: A session created concurrently with account unlink survives the unlink
- Exploited in the wild
- Not known
- Fix
- None listed
What is CVE-2026-123804?
CVE-2026-123804 is a medium-severity vulnerability in supertokens-core, published on 9 Nov 2026.
Official description
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.
Which versions are affected by CVE-2026-123804?
How do I fix CVE-2026-123804?
No fix has been published for CVE-2026-123804 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-123804 being exploited?
There is no known exploitation of CVE-2026-123804 in the wild and no public exploit code.
Sources
Also known as GHSA-2pc4-vw9j-454c.