CVE-2026-18794

OpenRGB: insufficient input data checks lead to Denial-of-Service, memory overread and overwrite

8.8 HighFix available

The OpenRGB network protocol allows attackers to cause memory exhaustion and out-of-bounds memory reads and writes by passing inconsistent data.

Attack profile

How easy it is to exploit

Attack vector: Network
Complexity: Low
Privileges needed: None
User interaction: None

What an attacker can affect

Confidentiality: None
Integrity: Low
Availability: High

Exploit likelihood

0.43%Unchanged since Aug 27, 2026

What each source reports

CVE List Score used 8.8

OpenRGB: insufficient input data checks lead to Denial-of-Service, memory overread and overwrite

The OpenRGB network protocol allows attackers to cause memory exhaustion and out-of-bounds memory reads and writes by passing inconsistent data.

Record: CVE-2026-18794
CVSS 4.0: 8.8 HighCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N
CVSS 3.1: 8.2 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H
Weakness: CWE-1288
Updated: 2026-11-02

EUVDEUVD-2026-66362 8.8

The OpenRGB network protocol allows attackers to cause memory exhaustion and out-of-bounds memory reads and writes by passing inconsistent data.

Record: EUVD-2026-66362
CVSS 4.0: 8.8 HighCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N
Updated: 2026-11-02

GitHub AdvisoriesGHSA-2hph-9m2g-p27v 8.8

The OpenRGB network protocol allows attackers to cause memory exhaustion and out-of-bounds memory...

The OpenRGB network protocol allows attackers to cause memory exhaustion and out-of-bounds memory reads and writes by passing inconsistent data.

Record: GHSA-2hph-9m2g-p27v
CVSS 4.0: 8.8 HighCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CVSS 3.1: 8.2 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H
Weakness: CWE-1288
Updated: 2026-11-02

NVD 8.8

The OpenRGB network protocol allows attackers to cause memory exhaustion and out-of-bounds memory reads and writes by passing inconsistent data.

Record: CVE-2026-18794
CVSS 4.0: 8.8 HighCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CVSS 3.1: 8.2 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H
Weakness: CWE-1288
Updated: 2026-11-02

OSV 8.8

OpenRGB: insufficient input data checks lead to Denial-of-Service, memory overread and overwrite

The OpenRGB network protocol allows attackers to cause memory exhaustion and out-of-bounds memory reads and writes by passing inconsistent data.

Record: CVE-2026-18794
CVSS 4.0: 8.8 HighCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N
Weakness: CWE-1288
Updated: 2026-11-02

OSVDEBIAN-CVE-2026-18794 8.8

The OpenRGB network protocol allows attackers to cause memory exhaustion and out-of-bounds memory reads and writes by passing inconsistent data.

Record: DEBIAN-CVE-2026-18794
CVSS 4.0: 8.8 HighCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Updated: 2026-11-02

OSVUBUNTU-CVE-2026-18794 8.8

The OpenRGB network protocol allows attackers to cause memory exhaustion and out-of-bounds memory reads and writes by passing inconsistent data.

Record: UBUNTU-CVE-2026-18794
CVSS 4.0: 8.8 HighCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N
CVSS 3.1: 8.2 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H
Updated: 2026-11-02

Affected products

calcprogrammer1 openrgb

Affected packages

Affected packages
Package	Affected	Fixed
`openrgb` Debian:14	before 1.0+ds-0.1, plus listed versions 0.9+git20241227+ds-10.9+git20250413+ds-10.9+git20250413+ds-20.9+git20251009+ds-1	1.0+ds-0.1
`openrgb` Ubuntu:26.10	All versions, plus listed versions 0.9+git20251009+ds-1	None known
`openrgb` Ubuntu:26.04:LTS	All versions, plus listed versions 0.9+git20250413+ds-20.9+git20251009+ds-1	None known

History

History
Recorded	Changed	Sources
Nov 2, 2026	first indexed	CVE List, EUVD, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2026-18794 is a high vulnerability (CVSS 8.8) in Calcprogrammer1 Openrgb, published August 26, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.43%, the 36th percentile. Fixed in openrgb 1.0+ds-0.1.

References

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