{"id":"CVE-2026-119409","state":"PUBLISHED","title":"OPNsense before 26.7.8 Root Command Injection via Firmware Mirror Setting","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.","publishedAt":"2026-10-30T11:30:46.595Z","updatedAt":"2026-10-30T15:55:57.541Z","severity":{"score":8.6,"label":"High","version":"4.0","vector":"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","source":"VulnCheck"},"assigner":"VulnCheck","products":["opnsense core"],"affected":[{"vendor":"opnsense","product":"core","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThan":"26.7.8","versionType":"semver"},{"version":"26.7.8","status":"unaffected","versionType":"semver"}]}],"references":["https://github.com/opnsense/core/security/advisories/GHSA-p683-f7x2-pm4p","https://github.com/opnsense/core/commit/1cc41fc39da99d59818c789b3b561f1515126f47","https://github.com/opnsense/core/commit/8e214533d33c3af7481e86f616ee615adc6a0a73","https://github.com/opnsense/update/commit/9bfd3b7020499b6032ee64804193a9f3ce8178fa","https://github.com/opnsense/update/blob/a2b8a10ba85f13b2cd002abb4c8692dde99f0261/src/update/opnsense-update.sh.in#L165","https://abraxaslabs.tech/research/opnsense-firmware-mirror-sed","https://github.com/opnsense/core","https://www.vulncheck.com/advisories/opnsense-before-26.7.8-root-command-injection-via-firmware-mirror-setting"],"weaknesses":["CWE-78"],"ingestedAt":"2026-10-30T16:02:06.859Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/119xxx/CVE-2026-119409.json","commit":"f6a539faf8b8016bd4a4e7f5576fe5f6ea87d248","baselineCommit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-119409","state":"PUBLISHED","datePublished":"2026-10-30T11:30:46.595Z","dateUpdated":"2026-10-30T15:55:57.541Z","assignerShortName":"VulnCheck","assignerOrgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","dateReserved":"2026-10-30T01:22:43.836Z"},"containers":{"cna":{"title":"OPNsense before 26.7.8 Root Command Injection via Firmware Mirror Setting","descriptions":[{"lang":"en","value":"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":[{"vendor":"opnsense","product":"core","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThan":"26.7.8","versionType":"semver"},{"version":"26.7.8","status":"unaffected","versionType":"semver"}]}],"references":[{"url":"https://github.com/opnsense/core/security/advisories/GHSA-p683-f7x2-pm4p","tags":["vendor-advisory"],"name":"GitHub Security Advisory (GHSA-p683-f7x2-pm4p)"},{"url":"https://github.com/opnsense/core/commit/1cc41fc39da99d59818c789b3b561f1515126f47","tags":["patch"]},{"url":"https://github.com/opnsense/core/commit/8e214533d33c3af7481e86f616ee615adc6a0a73","tags":["patch"]},{"url":"https://github.com/opnsense/update/commit/9bfd3b7020499b6032ee64804193a9f3ce8178fa","tags":["patch"]},{"url":"https://github.com/opnsense/update/blob/a2b8a10ba85f13b2cd002abb4c8692dde99f0261/src/update/opnsense-update.sh.in#L165","tags":["technical-description"]},{"url":"https://abraxaslabs.tech/research/opnsense-firmware-mirror-sed","tags":["third-party-advisory"]},{"url":"https://github.com/opnsense/core","tags":["product"]},{"url":"https://www.vulncheck.com/advisories/opnsense-before-26.7.8-root-command-injection-via-firmware-mirror-setting","name":"VulnCheck Advisory: OPNsense before 26.7.8 Root Command Injection via Firmware Mirror Setting","tags":["third-party-advisory"]}],"metrics":[{"format":"CVSS","cvssV4_0":{"version":"4.0","vectorString":"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","attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"NONE","privilegesRequired":"HIGH","userInteraction":"NONE","vulnConfidentialityImpact":"HIGH","vulnIntegrityImpact":"HIGH","vulnAvailabilityImpact":"HIGH","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","subAvailabilityImpact":"NONE","baseScore":8.6,"baseSeverity":"HIGH"}},{"format":"CVSS","cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"HIGH","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH","baseScore":7.2,"baseSeverity":"HIGH"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-78","lang":"en","description":"Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')","type":"CWE"}]}],"providerMetadata":{"shortName":"VulnCheck","orgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","dateUpdated":"2026-10-30T11:30:46.595Z"},"datePublic":"2026-10-28T00:00:00.000Z","cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:opnsense:opnsense:*:*:*:*:*:*:*:*","versionEndExcluding":"26.7.8"}]}]}],"credits":[{"lang":"en","value":"Voidlet","type":"finder"},{"lang":"en","value":"Abraxas Labs","type":"reporter"},{"lang":"en","value":"Franco Fichtner","type":"remediation developer"}],"x_generator":{"engine":"vulncheck-endgame"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-10-30T15:34:50.876282Z","id":"CVE-2026-119409","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-10-30T15:55:57.541Z"}}]}}}