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CVE-2026-119409 Details

ANALYZED

This CVE record has been analyzed and enriched by NVDAPI.com as an independent party.

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.

Metrics

CVSS 3.x Severity and Vector Strings:

VolerionCVSS-B:6.8 MEDIUMVector:CVSS:3.1/AV:A/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

CNA: [email protected]CVSS-B:7.2 HIGHVector:CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

References to Advisories, Solutions, and Tools

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URL	Source(s)	Tag(s)
https://abraxaslabs.tech/research/opnsense-firmware-mirror-sed	[email protected]	ExploitTechnical Analysis
https://github.com/opnsense/core	[email protected]	Source CodeVendor
https://github.com/opnsense/core/commit/1cc41fc39da99d59818c789b3b561f1515126f47	[email protected]	Source CodeVendor
https://github.com/opnsense/core/commit/8e214533d33c3af7481e86f616ee615adc6a0a73	[email protected]	Source CodeVendor
https://github.com/opnsense/core/security/advisories/GHSA-p683-f7x2-pm4p	[email protected]	AdvisoryExploitRemedyVendor
https://github.com/opnsense/update/blob/a2b8a10ba85f13b2cd002abb4c8692dde99f0261/src/update/opnsense-update.sh.in#L165	[email protected]	Source CodeVendor
https://github.com/opnsense/update/commit/9bfd3b7020499b6032ee64804193a9f3ce8178fa	[email protected]	Source CodeVendor
https://www.vulncheck.com/advisories/opnsense-before-26.7.8-root-command-injection-via-firmware-mirror-setting	[email protected]	AdvisoryBundleRemedy

see all 8 references

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-78	Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')	[email protected]

Affected Products

Product	Versions
OPNsense	<= 26.7.7 (semver) <= 26.4.2p5
CPE cpe:2.3:a:opnsense:opnsense:::::::: Remediation Upgrade: 26.7.8moderate effort Upgrade: 26.10moderate effort

Change History

2 change records found show changes

Date	Action	Recorded By
Oct 30, 2026	CVE Modified	CISA-ADP
Oct 30, 2026	New CVE Received	[email protected]