Medium severity · published Jun 21, 2026
CVE-2026-12804
lemonldap-ng SAML Common Domain Cookie Endpoint CDC.pm redirect
4.3
CVSS
0.4%
EPSS
No
On KEV
Description
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."
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
None
Integrity
Low
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 39% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
LE
lemonldap-ng · Lemonldap-ng
2.0; 2.1; 2.2; 2.3; 2.4; 2.5; +18 more · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-12804
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-12804
gitlab.ow2.org
https://gitlab.ow2.org/lemonldap-ng/lemonldap-ng/-/merge_requests/979
gitlab.ow2.org
https://gitlab.ow2.org/lemonldap-ng/lemonldap-ng/-/work_items/3619
vuldb.com
https://vuldb.com/cve/CVE-2026-12804
vuldb.com
https://vuldb.com/submit/836105
vuldb.com
https://vuldb.com/vuln/372598
vuldb.com
https://vuldb.com/vuln/372598/cti
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