CVE-2026-40819 Unauthenticated SQLi in sync_data24 task
Unauthenticated attackers can exploit SQL injection in the sync_data24 task to read sensitive data from the mbCONNECT24 server.
- 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-2026-40819?
CVE-2026-40819 is a high-severity SQL injection vulnerability in Helmholz mbCONNECT24, published on 27 May 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
An unauthenticated remote attacker can exploit an unauthenticated SQL Injection vulnerability in the sync_data24 task due to improper neutralization of special elements in a SQL SELECT command. This can result in a total loss of confidentiality.
Weakness: CWE-89
Which versions are affected by CVE-2026-40819?
How do I fix CVE-2026-40819?
No fix has been published for CVE-2026-40819 yet. Limit exposure of the affected software until one is available.
Use parameterised queries everywhere and never build SQL by joining strings. Upgrade affected software first; a web application firewall only buys time. More about SQL injection.
Is CVE-2026-40819 being exploited?
There is no known exploitation of CVE-2026-40819 in the wild and no public exploit code.
Sources
Also known as GHSA-jq3h-5mgm-m888.