{"id":"CVE-2026-90774","aliases":["EUVD-2026-76995","GHSA-jcjc-q6x9-fww9"],"status":"published","title":"rustypaste before 0.18.1 Path Traversal via filename header","description":"rustypaste before 0.18.1 validates the destination path before applying the optional custom filename HTTP header, allowing attackers to bypass directory-escape checks. Attackers can supply path traversal sequences in the filename header to write files outside the configured upload directory to arbitrary locations.","severity":{"version":"4.0","score":8.7,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-11","score":0.01358,"percentile":0.72046,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-22"],"published":"2026-09-13T10:45:44Z","modified":"2026-10-28T02:31:00Z","exploits":[{"source":"nuclei","id":"CVE-2026-90774","title":"rustypaste \u003c 0.18.1 - Filename Header Path Traversal","type":"detection template","url":"https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2026/CVE-2026-90774.yaml"}],"products":[{"vendor":"orhun","product":"rustypaste"}],"references":[{"url":"https://github.com/orhun/rustypaste/issues/622","tags":["issue-tracking","exploit","report"]},{"url":"https://github.com/orhun/rustypaste","tags":["product","package"]},{"url":"https://github.com/orhun/rustypaste/blob/v0.18.0/src/paste.rs","tags":["technical-description","article"]},{"url":"https://github.com/orhun/rustypaste/commit/ac05d552596af4a8429d80f30d11f67117ce02c8","tags":["patch","fix"]},{"url":"https://www.vulncheck.com/advisories/rustypaste-before-0.18.1-path-traversal-via-filename-header","tags":["third-party-advisory","advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-90774","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-jcjc-q6x9-fww9"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/90xxx/CVE-2026-90774.json","tags":["advisory"]}],"sources":{"cve":[{"id":"CVE-2026-90774","title":"rustypaste before 0.18.1 Path Traversal via filename header","description":"rustypaste before 0.18.1 validates the destination path before applying the optional custom filename HTTP header, allowing attackers to bypass directory-escape checks. Attackers can supply path traversal sequences in the filename header to write files outside the configured upload directory to arbitrary locations.","status":"published","published":"2026-09-13T10:45:44.589Z","modified":"2026-09-24T14:21:55.235Z","cvss":[{"version":"4.0","score":8.7,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N","level":"high","assessor":"cna"},{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","level":"high","assessor":"cna"}],"cwes":["CWE-22"],"updated_at":"2026-11-02T13:45:47.885058Z"}],"euvd":[{"id":"EUVD-2026-76995","description":"rustypaste before 0.18.1 validates the destination path before applying the optional custom filename HTTP header, allowing attackers to bypass directory-escape checks. Attackers can supply path traversal sequences in the filename header to write files outside the configured upload directory to arbitrary locations.","status":"published","published":"2026-09-13T10:45:44Z","modified":"2026-09-24T14:21:55Z","cvss":[{"version":"4.0","score":8.7,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N","level":"high"}],"updated_at":"2026-11-02T17:27:57.402158Z"}],"ghsa":[{"id":"GHSA-jcjc-q6x9-fww9","title":"rustypaste before 0.18.1 validates the destination path before applying the optional custom...","description":"rustypaste before 0.18.1 validates the destination path before applying the optional custom filename HTTP header, allowing attackers to bypass directory-escape checks. Attackers can supply path traversal sequences in the filename header to write files outside the configured upload directory to arbitrary locations.","status":"published","published":"2026-09-13T12:31:12Z","modified":"2026-09-13T12:31:19Z","cvss":[{"version":"4.0","score":8.7,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/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":"high"},{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","level":"high"}],"cwes":["CWE-22"],"updated_at":"2026-11-02T15:11:47.193563Z"}],"nvd":[{"id":"CVE-2026-90774","description":"rustypaste before 0.18.1 validates the destination path before applying the optional custom filename HTTP header, allowing attackers to bypass directory-escape checks. Attackers can supply path traversal sequences in the filename header to write files outside the configured upload directory to arbitrary locations.","status":"published","published":"2026-09-13T11:17:02.163Z","modified":"2026-09-23T17:17:47.507Z","cvss":[{"version":"4.0","score":8.7,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/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":"high","assessor":"secondary"},{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","level":"high","assessor":"secondary"}],"cwes":["CWE-22"],"updated_at":"2026-11-02T14:12:46.980627Z"}],"osv":[{"id":"CVE-2026-90774","title":"rustypaste before 0.18.1 Path Traversal via filename header","description":"rustypaste before 0.18.1 validates the destination path before applying the optional custom filename HTTP header, allowing attackers to bypass directory-escape checks. Attackers can supply path traversal sequences in the filename header to write files outside the configured upload directory to arbitrary locations.","status":"published","published":"2026-09-13T10:45:44.589Z","modified":"2026-10-28T02:31:00.403288797Z","cvss":[{"version":"4.0","score":8.7,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N","level":"high"}],"cwes":["CWE-22"],"updated_at":"2026-11-02T15:45:20.269367Z"}]}}