Vulnerability Description
Dancer2 versions before 2.2.0 for Perl serve a layout as a page when an equivalent spelling of its path misses the guard in the AutoPage handler. The handler compares the request path against the layout directory name as text, while the lookup that follows canonicalises it. A doubled slash, a dot segment, a percent-encoded slash, or a different capitalisation on a case-insensitive filesystem therefore misses the guard. The handler is off by default, enabled with auto_page. The layout wrapping every page is already public, so this discloses one of the application's other layouts.
CVSS Score
MEDIUM
Related Weaknesses (CWE)
References
- https://github.com/PerlDancer/Dancer2/commit/293fce08812b0928f34ab2d7b9357450707
- https://github.com/PerlDancer/Dancer2/commit/753b385350a54acb8d4b686723890205268
- https://github.com/PerlDancer/Dancer2/issues/1823
- https://metacpan.org/release/CROMEDOME/Dancer2-2.2.0/changes
- http://www.openwall.com/lists/oss-security/2026/09/22/1
FAQ
What is CVE-2026-93709?
CVE-2026-93709 is a vulnerability with a CVSS score of 5.3 (MEDIUM). Dancer2 versions before 2.2.0 for Perl serve a layout as a page when an equivalent spelling of its path misses the guard in the AutoPage handler. The handler compares the request path against the lay...
How severe is CVE-2026-93709?
CVE-2026-93709 has been rated MEDIUM with a CVSS base score of 5.3/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-93709?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.