CVE-2026-119409
OPNsense before 26.7.8 Root Command Injection via Firmware Mirror Setting
- State
- Published
- Severity
- 8.6 High
- Published
- Oct 30, 2026
- Updated
- Oct 30, 2026
- Reserved
- Oct 30, 2026
Description
OPNsense before 26.7.8 contains a command injection vulnerability that allows authenticated users with the System: Firmware privilege to execute commands as root by storing a malicious firmware mirror URL. Attackers can submit shell metacharacters through POST /api/core/firmware/set that opnsense-update evaluates with eval, and can also disable package signature verification through sed injection.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 8.6 High | CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N | VulnCheck |
| 3.1 | 7.2 High | CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H | VulnCheck |
Weaknesses
- CWE-78 Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
Affected Products
| Product | Versions |
|---|---|
coreopnsense |
|
References
- GitHub Security Advisory (GHSA-p683-f7x2-pm4p)vendor-advisory
- https://github.com/opnsense/core/commit/1cc41fc39da99d59818c789b3b561f1515126f47patch
- https://github.com/opnsense/core/commit/8e214533d33c3af7481e86f616ee615adc6a0a73patch
- https://github.com/opnsense/update/commit/9bfd3b7020499b6032ee64804193a9f3ce8178fapatch
- https://github.com/opnsense/update/blob/a2b8a10ba85f13b2cd002abb4c8692dde99f0261/src/update/opnsense-update.sh.in#L165technical-description
- https://abraxaslabs.tech/research/opnsense-firmware-mirror-sedthird-party-advisory
- https://github.com/opnsense/coreproduct
- VulnCheck Advisory: OPNsense before 26.7.8 Root Command Injection via Firmware Mirror Settingthird-party-advisory
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