CVE WatchSep 22, 2026

CVE-2026-93712

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.

CVSS

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No CVSS

EPSS

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KEV

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Exploit Today

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0-100

Published: Sep 22, 2026 · Last modified: Sep 22, 2026 · CWE-22

EPSS · 30d

Not enough EPSS history yet.

Technical description

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.

Official references

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