CVE-2026-4436: GPL Odorizers GPL750 (XL4) · Missing Authentication
Affects GPL Odorizers GPL750 (XL4)Source CVE Database V5
Not known to be exploited · CVSS 8.6 High : upgrade to v6.0 soon.
Data as of 30 Oct 2026, 11:52 UTC
- EPSS
- 0.4% chance of exploitation in 30 days – higher than 38% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
- Patch
- Available – fixed in v6.0, v20.0
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:NExploitation evidence
Disclosed: evidence found.
CVE published 9 Apr 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 30 Oct 2026.
What to do
Upgrade GPL750 (XL4) and GPL750 (XL4 Prime) to v6.0; GPL Odorizers GPL750 (XL7) and GPL Odorizers GPL750 (XL7 Prime) to v20.0.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| GPL OdorizersGPL750 (XL4) | Affected
| Fixed in
|
| GPL OdorizersGPL750 (XL4 Prime) | Affected
| Fixed in
|
| GPL OdorizersGPL Odorizers GPL750 (XL7) | Affected
| Fixed in
|
| GPL OdorizersGPL Odorizers GPL750 (XL7 Prime) | Affected
| Fixed in
|
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.