CVE-2020-26124
HighPublic exploitopenmediavault before 4.1.36 and 5.x before 5.5.12 allows authenticated PHP code injection attacks, via the sortfield POST parameter of rpc.php, because json_encode_safe is not used in config/databasebackend.inc.
Published Oct 2, 2020 · Updated Jul 8, 2026
Key Facts
Patch immediately- CVE-2020-26124 is a high-severity vulnerability (CVSS 8.8 v3.1) affecting Openmediavault.
- It is not listed in any known-exploited vulnerabilities catalog. Public exploit code is available.
- EPSS estimates a 67% probability of exploitation in the next 30 days.
- Fixed versions are available, including Openmediavault 4.1.36.
- Brandefense priority: patch immediately, because it is very likely to be exploited soon.
CVSS v3.1
8.8
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS (30-day exploit likelihood)
67%
Higher than 99.2% of all scored CVEs
Exploited in the wild
No known
Not in a known-exploited catalog
Public exploit code
Available
Proof-of-concept or weaponized module
Get the full CVE-2020-26124 brief as a PDF
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Description
openmediavault before 4.1.36 and 5.x before 5.5.12 allows authenticated PHP code injection attacks, via the sortfield POST parameter of rpc.php, because json_encode_safe is not used in config/databasebackend.inc. Successful exploitation allows arbitrary command execution on the underlying operating system as root.
Affected Products
1 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| OpenmediavaultOpenmediavault | See advisory | 4.1.36 |
Patched Releases
Openmediavault
4.1.36
Timeline
Publicly disclosed
Oct 2, 2020
Last updated
Jul 8, 2026
Weakness Type
- CWE-94 Improper Control of Generation of Code ('Code Injection')
References
FAQ
Common Questions.
openmediavault before 4.1.36 and 5.x before 5.5.12 allows authenticated PHP code injection attacks, via the sortfield POST parameter of rpc.php, because json_encode_safe is not used in config/databasebackend.inc.
Affected: Openmediavault. The full list is in the CVE brief.
It is not listed in any known-exploited vulnerabilities catalog.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
Public exploit code is available.
Fixed versions are available, including Openmediavault 4.1.36.
Brandefense priority: patch immediately, because it is very likely to be exploited soon.
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