Bug 2540978 - CVE-2026-95811 lemonldap-ng: lemonldap-ng: Access control bypass via non-normalized request URI [epel-all]
Summary: CVE-2026-95811 lemonldap-ng: lemonldap-ng: Access control bypass via non-norm...
Keywords:
Status: CLOSED ERRATA
Alias: None
Product: Fedora EPEL
Classification: Fedora
Component: lemonldap-ng
Version: epel10
Hardware: Unspecified
OS: Unspecified
medium
medium
Target Milestone: ---
Assignee: Xavier Bachelot
QA Contact:
URL:
Whiteboard: {"flaws": ["7096e9c2-f701-45ae-aa9c-9...
Depends On:
Blocks: CVE-2026-95811
TreeView+ depends on / blocked
 
Reported: 2026-09-25 07:34 UTC by Vladimir Vasilev
Modified: 2026-10-04 01:46 UTC (History)
1 user (show)

Fixed In Version: lemonldap-ng-2.23.4-1.el10_4 lemonldap-ng-2.23.4-1.el10_3 lemonldap-ng-2.23.4-1.el10_2 lemonldap-ng-2.23.4-1.el9 lemonldap-ng-2.23.4-1.el8
Clone Of:
Environment:
Last Closed: 2026-10-04 00:28:53 UTC
Type: ---
Embargoed:


Attachments (Terms of Use)

Description Vladimir Vasilev 2026-09-25 07:34:53 UTC
Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.

Lemonldap::NG::Handler versions from 2.0.0 before 2.16.10, from 2.17.0 before 2.21.6, from 2.22.0 before 2.23.4 for Perl allow an equivalent spelling of a path to bypass the locationRules that restrict it.

The handler matches each vhost's locationRules regular expressions against REQUEST_URI, the raw request line, while the web server routes on the path it has already percent-decoded and normalized. A request that percent-encodes a character of the path, inserts dot segments, or doubles a slash therefore reaches the protected resource under a URI that no rule regexp matches, and the vhost's default rule decides access. Deny rules, identity and group conditions, and unprotect and skip rules are bypassed alike.

Only a vhost whose default rule is more permissive than its other rules is affected. An authenticated user then reaches any URL a locationRules regexp was meant to restrict, but gains no more than that default rule already grants.

Comment 1 Fedora Update System 2026-09-25 08:15:26 UTC
FEDORA-EPEL-2026-d54ae88fef (lemonldap-ng-2.23.4-1.el10_2) has been submitted as an update to Fedora EPEL 10.2.
https://bodhi.fedoraproject.org/updates/FEDORA-EPEL-2026-d54ae88fef

Comment 2 Fedora Update System 2026-09-25 08:15:32 UTC
FEDORA-EPEL-2026-306ffcea82 (lemonldap-ng-2.23.4-1.el9) has been submitted as an update to Fedora EPEL 9.
https://bodhi.fedoraproject.org/updates/FEDORA-EPEL-2026-306ffcea82

Comment 3 Fedora Update System 2026-09-25 08:15:37 UTC
FEDORA-EPEL-2026-d6a23de049 (lemonldap-ng-2.23.4-1.el8) has been submitted as an update to Fedora EPEL 8.
https://bodhi.fedoraproject.org/updates/FEDORA-EPEL-2026-d6a23de049

Comment 4 Fedora Update System 2026-09-25 08:15:41 UTC
FEDORA-EPEL-2026-3ddfd6e04f (lemonldap-ng-2.23.4-1.el10_4) has been submitted as an update to Fedora EPEL 10.4.
https://bodhi.fedoraproject.org/updates/FEDORA-EPEL-2026-3ddfd6e04f

Comment 5 Fedora Update System 2026-09-25 08:15:46 UTC
FEDORA-EPEL-2026-1b43c541cb (lemonldap-ng-2.23.4-1.el10_3) has been submitted as an update to Fedora EPEL 10.3.
https://bodhi.fedoraproject.org/updates/FEDORA-EPEL-2026-1b43c541cb

Comment 6 Fedora Update System 2026-09-26 02:01:16 UTC
FEDORA-EPEL-2026-306ffcea82 has been pushed to the Fedora EPEL 9 testing repository.

You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-EPEL-2026-306ffcea82

See also https://fedoraproject.org/wiki/QA:Updates_Testing for more information on how to test updates.

Comment 7 Fedora Update System 2026-09-26 02:14:46 UTC
FEDORA-EPEL-2026-3ddfd6e04f has been pushed to the Fedora EPEL 10.4 testing repository.

You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-EPEL-2026-3ddfd6e04f

See also https://fedoraproject.org/wiki/QA:Updates_Testing for more information on how to test updates.

Comment 8 Fedora Update System 2026-09-26 02:17:45 UTC
FEDORA-EPEL-2026-1b43c541cb has been pushed to the Fedora EPEL 10.3 testing repository.

You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-EPEL-2026-1b43c541cb

See also https://fedoraproject.org/wiki/QA:Updates_Testing for more information on how to test updates.

Comment 9 Fedora Update System 2026-09-26 02:20:47 UTC
FEDORA-EPEL-2026-d54ae88fef has been pushed to the Fedora EPEL 10.2 testing repository.

You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-EPEL-2026-d54ae88fef

See also https://fedoraproject.org/wiki/QA:Updates_Testing for more information on how to test updates.

Comment 10 Fedora Update System 2026-09-26 02:23:36 UTC
FEDORA-EPEL-2026-d6a23de049 has been pushed to the Fedora EPEL 8 testing repository.

You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-EPEL-2026-d6a23de049

See also https://fedoraproject.org/wiki/QA:Updates_Testing for more information on how to test updates.

Comment 11 Fedora Update System 2026-10-04 00:28:53 UTC
FEDORA-EPEL-2026-3ddfd6e04f (lemonldap-ng-2.23.4-1.el10_4) has been pushed to the Fedora EPEL 10.4 stable repository.
If problem still persists, please make note of it in this bug report.

Comment 12 Fedora Update System 2026-10-04 01:10:23 UTC
FEDORA-EPEL-2026-1b43c541cb (lemonldap-ng-2.23.4-1.el10_3) has been pushed to the Fedora EPEL 10.3 stable repository.
If problem still persists, please make note of it in this bug report.

Comment 13 Fedora Update System 2026-10-04 01:25:25 UTC
FEDORA-EPEL-2026-d54ae88fef (lemonldap-ng-2.23.4-1.el10_2) has been pushed to the Fedora EPEL 10.2 stable repository.
If problem still persists, please make note of it in this bug report.

Comment 14 Fedora Update System 2026-10-04 01:43:46 UTC
FEDORA-EPEL-2026-306ffcea82 (lemonldap-ng-2.23.4-1.el9) has been pushed to the Fedora EPEL 9 stable repository.
If problem still persists, please make note of it in this bug report.

Comment 15 Fedora Update System 2026-10-04 01:46:40 UTC
FEDORA-EPEL-2026-d6a23de049 (lemonldap-ng-2.23.4-1.el8) has been pushed to the Fedora EPEL 8 stable repository.
If problem still persists, please make note of it in this bug report.


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