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.

Related CPE's

Could not find any relations

References

https://abraxaslabs.tech/research/opnsense-firmware-mirror-sed

https://github.com/opnsense/core

https://github.com/opnsense/core/commit/1cc41fc39da99d59818c789b3b561f1515126f47

https://github.com/opnsense/core/commit/8e214533d33c3af7481e86f616ee615adc6a0a73

https://github.com/opnsense/core/security/advisories/GHSA-p683-f7x2-pm4p

https://github.com/opnsense/update/blob/a2b8a10ba85f13b2cd002abb4c8692dde99f0261/src/update/opnsense-update.sh.in#L165

https://github.com/opnsense/update/commit/9bfd3b7020499b6032ee64804193a9f3ce8178fa

https://www.vulncheck.com/advisories/opnsense-before-26.7.8-root-command-injection-via-firmware-mirror-setting

Weaknesses

[email protected]

Secondary
CWE-78

CVSS impact metrics

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

7.2 · High

Information

Source identifier

[email protected]

Vulnerability status

Deferred

Published

2026-10-30T12:16:37.510Z

8 hours ago

Last modified

2026-10-30T19:23:25.493Z

1 hour ago