{"id":"CVE-2026-17545","summary":"PHP on Windows: Reserved Device Names Are Not Rejected Before File/Stream I/O which can cause DoS","details":"On Windows, PHP's filesystem and stream APIs do not reject reserved device names such as CON, PRN, AUX, NUL, COM1 to COM9, LPT1 to LPT9, CONIN$ and CONOUT$ when they appear as a component of a path. An attacker-controlled filename therefore reaches CreateFileW() and opens a device instead of the regular file the application expected, which can block or hang the request and exhaust worker processes.","aliases":["BIT-libphp-2026-17545","BIT-php-2026-17545","BIT-php-min-2026-17545","GHSA-9f67-6fw4-hpfp"],"modified":"2026-11-11T02:56:03.381297650Z","published":"2026-09-25T20:18:11.288Z","related":["openSUSE-SU-2026:11901-1"],"database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/17xxx/CVE-2026-17545.json","cna_assigner":"php","cwe_ids":["CWE-67"]},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/17xxx/CVE-2026-17545.json"},{"type":"ADVISORY","url":"https://github.com/php/php-src/security/advisories/GHSA-9f67-6fw4-hpfp"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-17545"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/php/php-src","events":[{"introduced":"70ee6c20ad97e02c2b8098aeea96fefbbc3ac5c2"},{"fixed":"0be211a0cf752780881a9611224f8adc516af573"},{"introduced":"d26068059e83fe40de3430a512471d194119bee0"},{"fixed":"2d3433d24d59f45703be2b4fb40d74e5a41b136b"},{"introduced":"b437f2b32eb364c9496d24abcc734272e5c9c980"},{"fixed":"c31ae58ecbedc7a85dac0eee5a6a88da73543e70"},{"introduced":"685e99655ae97c667950f7f7d176985958718f56"},{"fixed":"678778973bb4d4185c06ef1320de50f1a975d3c8"}],"database_specific":{"extracted_events":[{"cpe":"cpe:2.3:a:php:php:*:*:*:*:*:*:*:*","range":[{"introduced":"8.2.0"},{"fixed":"8.2.34"}],"source":"CPE_RANGE"},{"range":[{"introduced":"8.3.0"},{"fixed":"8.3.35"}],"source":"CPE_RANGE","cpe":"cpe:2.3:a:php:php:*:*:*:*:*:*:*:*"},{"source":"CPE_RANGE","cpe":"cpe:2.3:a:php:php:*:*:*:*:*:*:*:*","range":[{"introduced":"8.4.0"},{"fixed":"8.4.26"}]},{"range":[{"introduced":"8.5.0"},{"fixed":"8.5.11"}],"source":"CPE_RANGE","cpe":"cpe:2.3:a:php:php:*:*:*:*:*:*:*:*"}]}}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-17545.json"}}],"schema_version":"1.9.2","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:H"}]}