CVE-2026-93709 Affecting libdancer2-perl package, versions <2.2.2-1
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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- published22 Sept 2026
- disclosed22 Sept 2026
Introduced: 22 Sep 2026
NewCVE-2026-93709 (opens in a new tab)How to fix?
Upgrade Debian:unstable libdancer2-perl to version 2.2.2-1 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream libdancer2-perl package and not the libdancer2-perl package as distributed by Debian.
See How to fix? for Debian:unstable relevant fixed versions and status.
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.
References
- https://security-tracker.debian.org/tracker/CVE-2026-93709
- https://github.com/PerlDancer/Dancer2/commit/293fce08812b0928f34ab2d7b9357450707c3630.patch
- https://github.com/PerlDancer/Dancer2/commit/753b385350a54acb8d4b686723890205268634a8.patch
- 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