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CVE-2026-93709

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

5.3 MediumFix available

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.

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
Low
Privileges needed
None
User interaction
None

What an attacker can affect

Confidentiality
Low
Integrity
None
Availability
None

Exploit likelihood

0.45%Up 0.3 points since Sep 22, 2026
90%50%10%1%

What each source reports

CVE List Score used 5.3

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

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.

Record
CVE-2026-93709
CVSS 3.1
5.3 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Weakness
CWE-41
Updated
2026-11-02
EUVDEUVD-2026-84255 5.3

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.

Record
EUVD-2026-84255
CVSS 3.1
5.3 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Updated
2026-11-02
GitHub AdvisoriesGHSA-8fpv-59mj-6jfr 5.3

Dancer2 versions before 2.2.0 for Perl serve a layout as a page when an equivalent spelling of...

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.

Record
GHSA-8fpv-59mj-6jfr
CVSS 3.1
5.3 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Weakness
CWE-41
Updated
2026-11-02
NVD 5.3

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.

Record
CVE-2026-93709
CVSS 3.1
5.3 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Weakness
CWE-41
Updated
2026-11-02
OSV 5.3

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

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.

Record
CVE-2026-93709
CVSS 3.1
5.3 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Weakness
CWE-41
Updated
2026-11-02
OSVDEBIAN-CVE-2026-93709 5.3

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.

Record
DEBIAN-CVE-2026-93709
CVSS 3.1
5.3 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Updated
2026-11-02
OSVUBUNTU-CVE-2026-93709 5.3

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.

Record
UBUNTU-CVE-2026-93709
CVSS 3.1
5.3 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Updated
2026-11-02
OSVopenSUSE-SU-2026:12202-1 No score

perl-Dancer2-2.2.2-1.1 on GA media

These are all security issues fixed in the perl-Dancer2-2.2.2-1.1 package on the GA media of openSUSE Tumbleweed.

Record
openSUSE-SU-2026:12202-1
Updated
2026-11-02

Affected packages

Affected packages
PackageAffectedFixed
libdancer2-perl
Debian:12
All versions, plus listed versions
0.400001+dfsg-11.0.0+dfsg-11.1.0+dfsg-11.1.1+dfsg-11.1.2+dfsg-12.0.1-12.1.0-12.2.2-1
None known
libdancer2-perl
Debian:13
All versions, plus listed versions
1.1.2+dfsg-12.0.1-12.1.0-12.2.2-1
None known
libdancer2-perl
Debian:14
before 2.2.2-1, plus listed versions
1.1.2+dfsg-12.0.1-12.1.0-1
2.2.2-1
libdancer2-perl
Ubuntu:16.04:LTS
All versions, plus listed versions
0.160003+dfsg-10.163000+dfsg-10.166001+dfsg-1
None known
libdancer2-perl
Ubuntu:18.04:LTS
All versions, plus listed versions
0.205000+dfsg-10.205002+dfsg-10.205002+dfsg-2
None known
libdancer2-perl
Ubuntu:20.04:LTS
All versions, plus listed versions
0.208001+dfsg-10.208002+dfsg-10.300000+dfsg-1
None known
libdancer2-perl
Ubuntu:22.04:LTS
All versions, plus listed versions
0.300005+dfsg-10.301004+dfsg-1
None known
libdancer2-perl
Ubuntu:24.04:LTS
All versions, plus listed versions
0.400001+dfsg-11.0.0+dfsg-11.1.0+dfsg-1
None known
libdancer2-perl
Ubuntu:26.10
All versions, plus listed versions
1.1.2+dfsg-12.1.0-1
None known
libdancer2-perl
Ubuntu:26.04:LTS
All versions, plus listed versions
1.1.2+dfsg-1
None known
perl-Dancer2
openSUSE:Tumbleweed
From an advisory covering 4 CVEs
before 2.2.2-1.1
2.2.2-1.1

History

History
RecordedChangedSources
affected, facts
first indexedCVE List, EUVD, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2026-93709 is a medium vulnerability (CVSS 5.3) in libdancer2-perl, published September 22, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.45%, the 39th percentile. Fixed in libdancer2-perl 2.2.2-1.

References

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