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CVE-2026-93710

Dancer2 versions from 2.0.0 before 2.2.0 for Perl dispatch a route that a dying hook refused when the exception handler halts the response in compile_hooks

7.5 HighFix available

Dancer2 versions from 2.0.0 before 2.2.0 for Perl dispatch a route that a dying hook refused when the exception handler halts the response in compile_hooks.

A hook that dies fires core.app.hook_exception, then calls cleanup unless the failing hook is the exception handler. A handler that halts does not stop that cleanup, which discards the request, response and session the dispatcher has yet to read, so the refused route runs.

The handler has to halt the response object by calling its halt method or setting is_halted: the halt keyword unwinds through with_return before cleanup runs.

A check in a before hook is not enforced: the caller gets the refusal, while the route body runs and its writes land.

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
None
Integrity
None
Availability
High

Exploit likelihood

0.63%Up 0.5 points since Sep 22, 2026
90%50%10%1%

What each source reports

CVE List Score used 7.5

Dancer2 versions from 2.0.0 before 2.2.0 for Perl dispatch a route that a dying hook refused when the exception handler halts the response in compile_hooks

Dancer2 versions from 2.0.0 before 2.2.0 for Perl dispatch a route that a dying hook refused when the exception handler halts the response in compile_hooks.

A hook that dies fires core.app.hook_exception, then calls cleanup unless the failing hook is the exception handler. A handler that halts does not stop that cleanup, which discards the request, response and session the dispatcher has yet to read, so the refused route runs.

The handler has to halt the response object by calling its halt method or setting is_halted: the halt keyword unwinds through with_return before cleanup runs.

A check in a before hook is not enforced: the caller gets the refusal, while the route body runs and its writes land.

Record
CVE-2026-93710
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness
CWE-460
Updated
2026-11-02
EUVDEUVD-2026-84256 7.5

Dancer2 versions from 2.0.0 before 2.2.0 for Perl dispatch a route that a dying hook refused when the exception handler halts the response in compile_hooks.

A hook that dies fires core.app.hook_exception, then calls cleanup unless the failing hook is the exception handler. A handler that halts does not stop that cleanup, which discards the request, response and session the dispatcher has yet to read, so the refused route runs.

The handler has to halt the response object by calling its halt method or setting is_halted: the halt keyword unwinds through with_return before cleanup runs.

A check in a before hook is not enforced: the caller gets the refusal, while the route body runs and its writes land.

Record
EUVD-2026-84256
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-02
GitHub AdvisoriesGHSA-qp5m-r6hx-rjhj 7.5

Dancer2 versions from 2.0.0 before 2.2.0 for Perl dispatch a route that a dying hook refused when...

Dancer2 versions from 2.0.0 before 2.2.0 for Perl dispatch a route that a dying hook refused when the exception handler halts the response in compile_hooks.

A hook that dies fires core.app.hook_exception, then calls cleanup unless the failing hook is the exception handler. A handler that halts does not stop that cleanup, which discards the request, response and session the dispatcher has yet to read, so the refused route runs.

The handler has to halt the response object by calling its halt method or setting is_halted: the halt keyword unwinds through with_return before cleanup runs.

A check in a before hook is not enforced: the caller gets the refusal, while the route body runs and its writes land.

Record
GHSA-qp5m-r6hx-rjhj
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness
CWE-460
Updated
2026-11-02
NVD 7.5

Dancer2 versions from 2.0.0 before 2.2.0 for Perl dispatch a route that a dying hook refused when the exception handler halts the response in compile_hooks.

A hook that dies fires core.app.hook_exception, then calls cleanup unless the failing hook is the exception handler. A handler that halts does not stop that cleanup, which discards the request, response and session the dispatcher has yet to read, so the refused route runs.

The handler has to halt the response object by calling its halt method or setting is_halted: the halt keyword unwinds through with_return before cleanup runs.

A check in a before hook is not enforced: the caller gets the refusal, while the route body runs and its writes land.

Record
CVE-2026-93710
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness
CWE-460
Updated
2026-11-02
OSV 7.5

Dancer2 versions from 2.0.0 before 2.2.0 for Perl dispatch a route that a dying hook refused when the exception handler halts the response in compile_hooks

Dancer2 versions from 2.0.0 before 2.2.0 for Perl dispatch a route that a dying hook refused when the exception handler halts the response in compile_hooks.

A hook that dies fires core.app.hook_exception, then calls cleanup unless the failing hook is the exception handler. A handler that halts does not stop that cleanup, which discards the request, response and session the dispatcher has yet to read, so the refused route runs.

The handler has to halt the response object by calling its halt method or setting is_halted: the halt keyword unwinds through with_return before cleanup runs.

A check in a before hook is not enforced: the caller gets the refusal, while the route body runs and its writes land.

Record
CVE-2026-93710
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness
CWE-460
Updated
2026-11-02
OSVDEBIAN-CVE-2026-93710 7.5

Dancer2 versions from 2.0.0 before 2.2.0 for Perl dispatch a route that a dying hook refused when the exception handler halts the response in compile_hooks. A hook that dies fires core.app.hook_exception, then calls cleanup unless the failing hook is the exception handler. A handler that halts does not stop that cleanup, which discards the request, response and session the dispatcher has yet to read, so the refused route runs. The handler has to halt the response object by calling its halt method or setting is_halted: the halt keyword unwinds through with_return before cleanup runs. A check in a before hook is not enforced: the caller gets the refusal, while the route body runs and its writes land.

Record
DEBIAN-CVE-2026-93710
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-02
OSVUBUNTU-CVE-2026-93710 7.5

Dancer2 versions from 2.0.0 before 2.2.0 for Perl dispatch a route that a dying hook refused when the exception handler halts the response in compile_hooks. A hook that dies fires core.app.hook_exception, then calls cleanup unless the failing hook is the exception handler. A handler that halts does not stop that cleanup, which discards the request, response and session the dispatcher has yet to read, so the refused route runs. The handler has to halt the response object by calling its halt method or setting is_halted: the halt keyword unwinds through with_return before cleanup runs. A check in a before hook is not enforced: the caller gets the refusal, while the route body runs and its writes land.

Record
UBUNTU-CVE-2026-93710
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
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: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-2026-93710 is a high vulnerability (CVSS 7.5) 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 0.63%, the 50th percentile. Fixed in libdancer2-perl 2.2.2-1.

References

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