CVE-2026-102248 Rebuild Login Endpoint login improper authentication
Attackers can bypass authentication on the Rebuild login endpoint to gain unauthorized access to user accounts.
- 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-2026-102248?
CVE-2026-102248 is a medium-severity authentication bypass vulnerability in Rebuild, published on 29 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A vulnerability was identified in Rebuild up to 4.4.7/4.5.0-beta5. This affects an unknown part of the file /user/login of the component Login Endpoint. The manipulation leads to improper authentication. It is possible to initiate the attack remotely. The exploit is publicly available and might be used. The vendor was contacted early about this disclosure but did not respond in any way.
Weakness: CWE-287
Which versions are affected by CVE-2026-102248?
How do I fix CVE-2026-102248?
No fix has been published for CVE-2026-102248 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-2026-102248 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-102248 exists.
Sources
Also known as GHSA-cc3x-v8vh-qhvv.