What’s Vulnerable › Vulnerabilities

CVE-2026-12804: lemonldap-ng SAML Common Domain Cookie Endpoint CDC.pm redirect

• Severity: medium (CVSS 4.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-06-21 · updated 2026-06-22
• Weakness: CWE-601

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."

Affected products

• lemonldap-ng: 2.0, 2.1, 2.2, 2.3, 2.4, 2.5 (+18)

References

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

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