{"id":"CVE-2026-90774","title":"rustypaste before 0.18.1 validates the destination path before applying the optional custom filename HTTP header, allowing attackers to bypass directory-escape checks","summary":"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 …","severity":"high","cvss":7.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","cwe":["CWE-22"],"vendor":"orhun","product":"rustypaste","affected":["rustypaste < 0.18.1"],"published":"2026-09-13","updated":"2026-09-14","sourceUpdated":"2026-09-14T16:17:39.350","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-90774","references":[{"url":"https://github.com/orhun/rustypaste","label":"disclosure@vulncheck.com"},{"url":"https://github.com/orhun/rustypaste/blob/v0.18.0/src/paste.rs","label":"disclosure@vulncheck.com"},{"url":"https://github.com/orhun/rustypaste/commit/ac05d552596af4a8429d80f30d11f67117ce02c8","label":"disclosure@vulncheck.com"},{"url":"https://github.com/orhun/rustypaste/issues/622","label":"disclosure@vulncheck.com"},{"url":"https://www.vulncheck.com/advisories/rustypaste-before-0.18.1-path-traversal-via-filename-header","label":"disclosure@vulncheck.com"},{"url":"https://github.com/orhun/rustypaste/issues/622","label":"134c704f-9b21-4f2e-91b3-4a467353bcc0"}],"tags":["nvd","cve.org","exploit-available"],"epss":0.00383,"epssPercentile":0.32085,"ingestedAt":"2026-09-14T15:23:07.471Z","exploitAvailable":true,"ssvc":{"exploitation":"poc","automatable":"yes","technicalImpact":"partial","timestamp":"2026-09-14T15:35:02.688496Z"},"slug":"CVE-2026-90774","body":"## Overview\n\nrustypaste 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"midnight","depthScore":53,"depthScoreParts":{"impact":41.3,"likelihood":0.1,"exploitation":12,"ransomware":0},"changes":[{"seq":203105,"id":"CVE-2026-90774","ts":1789409574885,"field":"exploit_available","old":"false","new":"true"}]}