{"id":"CVE-2026-34461","summary":"Sandboxie-Plus SbieIniServer RunSbieCtrl stack buffer overflow allows local privilege escalation","details":"Sandboxie-Plus is an open source sandbox-based isolation software for Windows. In versions 1.17.2 and earlier, the SbieIniServer RunSbieCtrl handler contains a stack buffer overflow. The MSGID_SBIE_INI_RUN_SBIE_CTRL message is handled before normal sandbox and impersonation checks, and for non-sandboxed callers, the handler copies the trailing message payload into a fixed-size WCHAR ctrlCmd[128] stack buffer using memcpy without verifying the length fits within the buffer. The service pipe is created with a NULL DACL, allowing any local interactive process to connect and send an oversized payload to overflow the stack. This can lead to a crash of the SbieSvc service or potential code execution as SYSTEM. This issue has been fixed in version 1.17.3.","aliases":["GHSA-wpjw-jh2p-gwx7"],"modified":"2026-07-15T01:49:12.855543473Z","published":"2026-05-05T19:28:44.675Z","database_specific":{"cwe_ids":["CWE-121"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/34xxx/CVE-2026-34461.json","cna_assigner":"GitHub_M"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/34xxx/CVE-2026-34461.json"},{"type":"ADVISORY","url":"https://github.com/sandboxie-plus/Sandboxie/security/advisories/GHSA-wpjw-jh2p-gwx7"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-34461"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/sandboxie-plus/sandboxie","events":[{"introduced":"0"},{"fixed":"4f0dbecdcc10063ad1fa7c8f1080419613921f4a"}],"database_specific":{"cpe":"cpe:2.3:a:sandboxie-plus:sandboxie:*:*:*:*:plus:*:*:*","extracted_events":[{"introduced":"0"},{"fixed":"1.17.3"}],"source":["AFFECTED_FIELD","CPE_RANGE"]}}],"versions":["v1.17.2","v1.17.1","v1.17.0","v1.16.9","v1.16.8","v1.16.7","v1.16.6","v1.16.4","v1.16.3","v1.16.2","v1.16.1","v1.16.0","v1.15.12","v1.15.10","v1.15.9","v1.15.8","v1.15.7","v1.15.6","v1.15.5","v1.15.4","v1.15.3","v1.15.2","v1.15.1","v1.15.0","v1.14.10","v1.14.9","v1.14.8","v1.14.7","v1.14.6","v1.14.5","v1.14.4","v1.14.3","v1.14.1","v1.14.0","v1.13.7","v1.13.6","v1.13.5","v1.13.4","v1.13.3","v1.13.2","v1.13.1","v1.13.0","v1.12.9","v1.12.8","v1.12.7","v1.12.6","v1.12.5","v1.12.4","v1.12.3","v1.12.2","v1.12.1","v1.12.0","v1.11.4","v1.11.3","v1.11.2","v1.11.1","v1.11.0","v1.10.5","v1.10.4","v1.10.3","v1.10.2","v1.10.1","v1.9.8","v1.9.7","v1.9.6","v1.9.4","v1.9.3","v1.9.1","v1.9.0","v1.8.4","v1.8.3","v1.8.2a","v1.8.2","v1.8.1","v1.8.0","v1.7.2","v1.7.1","v1.7.0","v1.6.7","v1.6.6","v1.6.5","v1.6.4","v1.6.3","v1.6.2b","v1.6.1b","v1.6.1a","v1.6.1","v1.6.0","v1.5.3","v1.5.2","v1.5.1","v1.5.0","v1.4.2","v1.4.1","v1.4.0","v1.3.5","1.3.4","v1.3.3","v1.3.2","v1.3.1","v1.3.0","v1.2.9","v1.2.8","v1.2.7","v1.2.6","v1.2.4","v1.2.3","v1.2.2","v1.2.1","v1.1.3","v1.1.2","1.1.0","1.0.22","1.0.20","1.0.19","1.0.18","1.0.17","1.0.16","1.0.15","1.0.14","1.0.13","1.0.12","1.0.11","1.0.10","1.0.8","1.0.6","1.0.5","1.0.4","1.0.3","1.0.2","1.0.1","1.0.0","0.9.8d","0.9.8c","0.9.8","0.9.7e","0.9.7d","0.9.7c","0.9.7b","0.9.7","0.9.6","0.9.5","0.9.4","0.9.3","0.9.2","0.9.1","0.9.0a","0.8.8","0.8.7b","0.8.7","0.8.6","0.8.5","0.8.2","0.8.0","0.8.1","0.7.5","0.7.4","0.7.3","0.7.2","0.7.1","0.7.0","0.6.7","0.6.5","0.6.0","0.5.5","v0.5.4d","v0.5.4c","v0.5.4b","v0.5.4","v0.5.3b","v0.5.3a","v0.5.2","v0.5.1","v0.5.0","v0.4.5","v0.4.4","v0.4.3","v0.4.2","v0.4.1","v0.4.0","v0.3.5","v0.3","v0.2.2","v0.2.1","v0.2","v0.1","v5.40.1","v5.40"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-34461.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:L/AC:H/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N"}]}