CVE-2026-93709

Name	CVE-2026-93709
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.
Source	CVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
libdancer2-perl (PTS)	bookworm	0.400001+dfsg-1	vulnerable
	trixie	1.1.2+dfsg-1	vulnerable
	forky, sid	2.1.0-1	vulnerable

The information below is based on the following data on fixed versions.

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
libdancer2-perl	source	(unstable)	(unfixed)	unimportant

Notes

https://lists.security.metacpan.org/cve-announce/msg/43742968/
https://github.com/PerlDancer/Dancer2/issues/1823
Fixed by: https://github.com/PerlDancer/Dancer2/commit/293fce08812b0928f34ab2d7b9357450707c3630 (v2.2.0)
Fixed by: https://github.com/PerlDancer/Dancer2/commit/753b385350a54acb8d4b686723890205268634a8 (v2.2.0)
Only an issue when using Dancer2 on case-insensitive filesystem misses the guard in the AutoPage handler