CVE-2026-12804

MEDIUM 4.3

lemonldap-ng SAML Common Domain Cookie Endpoint CDC.pm redirect

CVSS Score

4.3

EPSS Score

0.0%

EPSS Percentile

0th

A vulnerability was detected in lemonldap-ng up to 2.23.0. Impacted is an unknown function in the library lemonldap-ng-portal/lib/Lemonldap/NG/Portal/CDC.pm of the component SAML Common Domain Cookie Endpoint. Performing a manipulation of the argument url results in open redirect. The attack is possible to be carried out remotely. The exploit is now public and may be used. Applying a patch is the recommended action to fix this issue. The vendor confirms, that "it has been fixed some days ago and will be available in 2.23.1. CDC is quite never used, so the impact is very low."

CWE	CWE-601
Vendor	n/a
Product	lemonldap-ng
Published	Jun 21, 2026
Last Updated	Jun 22, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N/E:P/RL:O/RC:C

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Scope

Confidentiality

Integrity

Availability

Affected Versions

n/a / lemonldap-ng

2.0 2.1 2.2 2.3 2.4 2.5 2.6 2.7 2.8 2.9 2.10 2.11 2.12 2.13 2.14 2.15 2.16 2.17 2.18 2.19 2.20 2.21 2.22 2.23.0

References

NVD ↗ CVE.org ↗ EPSS Data ↗

vuldb.com: https://vuldb.com/vuln/372598 vuldb.com: https://vuldb.com/vuln/372598/cti vuldb.com: https://vuldb.com/cve/CVE-2026-12804 vuldb.com: https://vuldb.com/submit/836105 gitlab.ow2.org: https://gitlab.ow2.org/lemonldap-ng/lemonldap-ng/-/work_items/3619 gitlab.ow2.org: https://gitlab.ow2.org/lemonldap-ng/lemonldap-ng/-/merge_requests/979

Credits

🔍 geochen (VulDB User) VulDB CNA Team