{"id":"CVE-2026-55897","state":"PUBLISHED","title":"luci-app-advanced-reboot read ACL exposes /bin/sh through file.exec, allowing delegated users to run commands as root","description":"luci-app-advanced-reboot is a LuCI (web interface) application for OpenWrt that provides a  way to reboot your router into an alternative firmware partition or perform  reboot operations directly from the web UI. Prior to 1.1.2-6, the luci-app-advanced-reboot read ACL in applications/luci-app-advanced-reboot/root/usr/share/rpcd/acl.d/luci-app-advanced-reboot.json grants rpcd file.exec permission for the general shell interpreter /bin/sh. An authenticated delegated session with that read ACL can supply caller-controlled params; rpcd authorizes the executable path and passes those arguments to the shell, allowing arbitrary commands to execute as root. Builds without the /bin/sh exec grant, including the checked openwrt-24.10 and openwrt-23.05 branches, are not affected by this specific chain. This vulnerability is fixed in 1.1.2-6.","publishedAt":"2026-09-21T19:29:37.003Z","updatedAt":"2026-09-21T20:06:41.423Z","severity":{"score":8.8,"label":"High","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","source":"GitHub_M"},"assigner":"GitHub_M","products":["openwrt luci"],"affected":[{"vendor":"openwrt","product":"luci","versions":[{"version":"< 1.1.2-6","status":"affected"}]}],"references":["https://github.com/openwrt/luci/security/advisories/GHSA-vj96-f37g-37f6","https://github.com/openwrt/luci/pull/8710","https://github.com/openwrt/luci/commit/2df00deb122093cbf429266ffef7ad06aaecb48f","https://github.com/openwrt/luci/commit/f85102548ee8325bfd581a0327b210b5f7670829"],"weaknesses":["CWE-78"],"ingestedAt":"2026-10-29T20:12:24.861Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/55xxx/CVE-2026-55897.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-55897","state":"PUBLISHED","datePublished":"2026-09-21T19:29:37.003Z","dateUpdated":"2026-09-21T20:06:41.423Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-06-17T16:59:42.760Z"},"containers":{"cna":{"title":"luci-app-advanced-reboot read ACL exposes /bin/sh through file.exec, allowing delegated users to run commands as root","descriptions":[{"lang":"en","value":"luci-app-advanced-reboot is a LuCI (web interface) application for OpenWrt that provides a  way to reboot your router into an alternative firmware partition or perform  reboot operations directly from the web UI. Prior to 1.1.2-6, the luci-app-advanced-reboot read ACL in applications/luci-app-advanced-reboot/root/usr/share/rpcd/acl.d/luci-app-advanced-reboot.json grants rpcd file.exec permission for the general shell interpreter /bin/sh. An authenticated delegated session with that read ACL can supply caller-controlled params; rpcd authorizes the executable path and passes those arguments to the shell, allowing arbitrary commands to execute as root. Builds without the /bin/sh exec grant, including the checked openwrt-24.10 and openwrt-23.05 branches, are not affected by this specific chain. This vulnerability is fixed in 1.1.2-6."}],"affected":[{"vendor":"openwrt","product":"luci","versions":[{"version":"< 1.1.2-6","status":"affected"}]}],"references":[{"url":"https://github.com/openwrt/luci/security/advisories/GHSA-vj96-f37g-37f6","name":"https://github.com/openwrt/luci/security/advisories/GHSA-vj96-f37g-37f6","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/openwrt/luci/pull/8710","name":"https://github.com/openwrt/luci/pull/8710","tags":["x_refsource_MISC"]},{"url":"https://github.com/openwrt/luci/commit/2df00deb122093cbf429266ffef7ad06aaecb48f","name":"https://github.com/openwrt/luci/commit/2df00deb122093cbf429266ffef7ad06aaecb48f","tags":["x_refsource_MISC"]},{"url":"https://github.com/openwrt/luci/commit/f85102548ee8325bfd581a0327b210b5f7670829","name":"https://github.com/openwrt/luci/commit/f85102548ee8325bfd581a0327b210b5f7670829","tags":["x_refsource_MISC"]}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":8.8,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"LOW","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","version":"3.1"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-78","lang":"en","description":"CWE-78: Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-09-21T19:29:37.003Z"},"source":{"advisory":"GHSA-vj96-f37g-37f6","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","references":[{"url":"https://github.com/openwrt/luci/security/advisories/GHSA-vj96-f37g-37f6","tags":["exploit"]}],"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-09-21T20:05:24.106310Z","id":"CVE-2026-55897","options":[{"Exploitation":"poc"},{"Automatable":"no"},{"Technical Impact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-09-21T20:06:41.423Z"}}]}}}