High severity7.2NVD Advisory· Published Oct 30, 2026
CVE-2026-119409
CVE-2026-119409
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.
Affected products
1Patches
Vulnerability mechanics
References
7- abraxaslabs.tech/research/opnsense-firmware-mirror-sednvd
- github.com/opnsense/core/commit/1cc41fc39da99d59818c789b3b561f1515126f47nvd
- github.com/opnsense/core/commit/8e214533d33c3af7481e86f616ee615adc6a0a73nvd
- github.com/opnsense/core/security/advisories/GHSA-p683-f7x2-pm4pnvd
- github.com/opnsense/update/blob/a2b8a10ba85f13b2cd002abb4c8692dde99f0261/src/update/opnsense-update.sh.innvd
- github.com/opnsense/update/commit/9bfd3b7020499b6032ee64804193a9f3ce8178fanvd
- www.vulncheck.com/advisories/opnsense-before-26.7.8-root-command-injection-via-firmware-mirror-settingnvd
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