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. 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.

CVSS v3 7.5 HIGH

7.5^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact NONE

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://github.com/PerlDancer/Dancer2/commit/2446a09ffb83fef71cc75c327bd6e4b1f007b885.patch
https://github.com/PerlDancer/Dancer2/security/advisories/GHSA-6xw8-v24c-m783
https://metacpan.org/release/CROMEDOME/Dancer2-2.2.0/changes
http://www.openwall.com/lists/oss-security/2026/09/22/4

Configurations

No configuration.

History

22 Sep 2026, 20:17

Type	Values Removed	Values Added
CVSS	v2 : ~~unknown~~ v3 : ~~unknown~~	v2 : unknown v3 : 7.5

22 Sep 2026, 03:16

Type	Values Removed	Values Added
References		() http://www.openwall.com/lists/oss-security/2026/09/22/4 -

22 Sep 2026, 01:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-09-22 01:16

Updated : 2026-09-22 20:17

NVD link : CVE-2026-93712

Mitre link : CVE-2026-93712

CVE.ORG link : CVE-2026-93712

JSON object : View

Products Affected

No product.

CWE

CWE-22

Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

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