{"id":"CVE-2026-93712","title":"Dancer2 versions from 2.1.0 before 2.2.0 for Perl serve files from outside public_dir via relative path segments in the File route handler.\n\nThe handler joins the request path onto public_dir without collapsing relative segments, and che…","summary":"Dancer2 versions from 2.1.0 before 2.2.0 for Perl serve files from outside public_dir via relative path segments in the File route handler.\n\nThe handler joins the request path onto public_dir without collapsing relative segments, and che…","severity":"high","cvss":7.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","cwe":["CWE-22"],"product":"Dancer2","affected":["Dancer2 >= 2.1.0 < 2.2.0"],"published":"2026-09-22","updated":"2026-09-22","sourceUpdated":"2026-09-22T20:17:12.580","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-93712","references":[{"url":"https://github.com/PerlDancer/Dancer2/commit/2446a09ffb83fef71cc75c327bd6e4b1f007b885.patch","label":"9b29abf9-4ab0-4765-b253-1875cd9b441e"},{"url":"https://github.com/PerlDancer/Dancer2/security/advisories/GHSA-6xw8-v24c-m783","label":"9b29abf9-4ab0-4765-b253-1875cd9b441e"},{"url":"https://metacpan.org/release/CROMEDOME/Dancer2-2.2.0/changes","label":"9b29abf9-4ab0-4765-b253-1875cd9b441e"},{"url":"http://www.openwall.com/lists/oss-security/2026/09/22/4","label":"af854a3a-2127-422b-91ae-364da2661108"}],"tags":["nvd","cve.org"],"epss":0.00548,"epssPercentile":0.43416,"ingestedAt":"2026-09-22T00:55:54.013Z","slug":"CVE-2026-93712","body":"## Overview\n\nDancer2 versions from 2.1.0 before 2.2.0 for Perl serve files from outside public_dir via relative path segments in the File route handler.\n\nThe handler joins the request path onto public_dir without collapsing relative segments, and checks only that the result is a readable regular file. A request for `/../outside.txt` escapes public_dir, and percent-encoding the dots reaches the same file.\n\nThe handler is off by default. An application is affected once it names File in route_handlers and sets static_handler to 0, which otherwise refuses a dot segment before the route runs.\n\nAny file the worker process can read is served to an unauthenticated request, including the application's config.yml above public_dir.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":41,"depthScoreParts":{"impact":41.3,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[{"seq":209384,"id":"CVE-2026-93712","ts":1790111550586,"field":"cvss","old":null,"new":"7.5"},{"seq":209383,"id":"CVE-2026-93712","ts":1790111550586,"field":"severity","old":"none","new":"high"}]}