CVE-2026-15612 LOIDC nonce validation bypass
Attackers can replay authentication tokens by bypassing OIDC nonce validation, potentially leading to account takeover in Logto deployments.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-15612?
CVE-2026-15612 is a critical authentication bypass vulnerability in Logto, published on 23 Jul 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Logto bypasses OIDC nonce validation when the nonce claim is absent from the id_token, enabling replay of authentication tokens and weakening session-binding.
Weakness: CWE-345
Which versions are affected by CVE-2026-15612?
How do I fix CVE-2026-15612?
No fix has been published for CVE-2026-15612 yet. Limit exposure of the affected software until one is available.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2026-15612 being exploited?
There is no known exploitation of CVE-2026-15612 in the wild and no public exploit code.
Sources
Also known as GHSA-2r4j-c245-2qx7.