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CVE-2026-93712

Dancer2 · Vulnerability

cve-program · severity unknownCVSS unknownCheck source for fixed versionsKEV status unknown

Original advisory

cve-program · CVE-2026-93712

Published

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. The 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. The 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. Any file the worker process can read is served to an unauthenticated request, including the application's config.yml above public_dir.

Read the publisher's advisory

Affected versions, risk and source history

cve-program · CVE-2026-93712

Published

Dancer2

https://cpan.org/modules

Publisher's version information

Shown as published. These rules are not interpreted as NuGet package version ranges.

{
                    "collectionURL": "https://cpan.org/modules",
                    "defaultStatus": "unaffected",
                    "modules": [
                        "Dancer2"
                    ],
                    "packageName": "Dancer2",
                    "packageURL": "pkg:cpan/Dancer2",
                    "programFiles": [
                        "lib/Dancer2/Handler/File.pm"
                    ],
                    "programRoutines": [
                        {
                            "name": "Dancer2::Handler::File::code"
                        }
                    ],
                    "repo": "https://github.com/PerlDancer/Dancer2",
                    "versions": [
                        {
                            "lessThan": "2.2.0",
                            "status": "affected",
                            "version": "2.1.0",
                            "versionType": "custom"
                        }
                    ]
                }

Original source record · Cite this exact observation · Complete original publisher JSON