CVE-2026-4436 GPL Odorizers GPL750 Missing Authentication for Critical Function
A remote attacker can manipulate Modbus registers to control odorant injection levels in gas lines due to missing authentication.
- 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-2026-4436?
CVE-2026-4436 is a high-severity missing authorization vulnerability in GPL Odorizers GPL750 (XL7 Prime), published on 9 Apr 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A low-privileged remote attacker can send Modbus packets to manipulate register values that are inputs to the odorant injection logic such that too much or too little odorant is injected into a gas line.
Weakness: CWE-306
Which versions are affected by CVE-2026-4436?
How do I fix CVE-2026-4436?
No fix has been published for CVE-2026-4436 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-4436 being exploited?
There is no known exploitation of CVE-2026-4436 in the wild and no public exploit code.
Sources
Also known as GHSA-frgm-v97w-x7w6.