{"id":"CVE-2026-18796","aliases":["EUVD-2026-72300","GHSA-q9vx-6fw9-4mv8"],"status":"published","title":"QSPI flash encryption side-channel leakage","description":"Any application that\n     uses external QSPI flash for encrypted XIP on nRF5340 and relies on that\n     encryption for confidentiality and/or integrity of the externally stored\n     code. No specific nRF Connect SDK version is the root cause; the weakness\n     is in the on-the-fly decryption scheme.","severity":{"version":"4.0","score":6.8,"vector":"CVSS:4.0/AV:P/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:N/SA:N","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-09","score":0.00104,"percentile":0.01045,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-1342"],"published":"2026-09-07T08:07:31Z","modified":"2026-09-10T11:17:10Z","products":[{"vendor":"nordic semiconductor asa","product":"nrf5340"}],"references":[{"url":"https://docs.nordicsemi.com/r/bundle/struct_sa/page/struct/sa.html"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-18796"},{"url":"https://github.com/advisories/GHSA-q9vx-6fw9-4mv8"}],"sources":{"cve":[{"id":"CVE-2026-18796","title":"QSPI flash encryption side-channel leakage","description":"Any application that\n     uses external QSPI flash for encrypted XIP on nRF5340 and relies on that\n     encryption for confidentiality and/or integrity of the externally stored\n     code. No specific nRF Connect SDK version is the root cause; the weakness\n     is in the on-the-fly decryption scheme.","status":"published","published":"2026-09-07T08:07:31.633Z","modified":"2026-09-10T11:17:10.632Z","cvss":[{"version":"4.0","score":6.8,"vector":"CVSS:4.0/AV:P/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:N/SA:N","level":"medium","assessor":"cna"}],"cwes":["CWE-1342"],"updated_at":"2026-11-02T14:20:12.60856Z"}],"euvd":[{"id":"EUVD-2026-72300","description":"Any application that\n     uses external QSPI flash for encrypted XIP on nRF5340 and relies on that\n     encryption for confidentiality and/or integrity of the externally stored\n     code. No specific nRF Connect SDK version is the root cause; the weakness\n     is in the on-the-fly decryption scheme.","status":"published","published":"2026-09-07T08:07:31Z","modified":"2026-09-10T11:17:10Z","cvss":[{"version":"4.0","score":6.8,"vector":"CVSS:4.0/AV:P/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:N/SA:N","level":"medium"}],"updated_at":"2026-11-02T17:28:25.63332Z"}],"ghsa":[{"id":"GHSA-q9vx-6fw9-4mv8","title":"Any application that\n     uses external QSPI flash for encrypted XIP on nRF5340 and relies on...","description":"Any application that\n     uses external QSPI flash for encrypted XIP on nRF5340 and relies on that\n     encryption for confidentiality and/or integrity of the externally stored\n     code. No specific nRF Connect SDK version is the root cause; the weakness\n     is in the on-the-fly decryption scheme.","status":"published","published":"2026-09-07T09:31:40Z","modified":"2026-09-07T09:31:46Z","cvss":[{"version":"4.0","score":6.8,"vector":"CVSS:4.0/AV:P/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"medium"}],"cwes":["CWE-1342"],"updated_at":"2026-11-02T15:11:26.557204Z"}],"nvd":[{"id":"CVE-2026-18796","description":"Any application that\n     uses external QSPI flash for encrypted XIP on nRF5340 and relies on that\n     encryption for confidentiality and/or integrity of the externally stored\n     code. No specific nRF Connect SDK version is the root cause; the weakness\n     is in the on-the-fly decryption scheme.","status":"published","published":"2026-09-07T09:17:15.57Z","modified":"2026-09-09T15:50:19.447Z","cvss":[{"version":"4.0","score":6.8,"vector":"CVSS:4.0/AV:P/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"medium","assessor":"secondary"}],"cwes":["CWE-1342"],"updated_at":"2026-11-02T14:12:44.082631Z"}]}}