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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. The vendor was contacted early about this disclosure but did not respond in any way.

PUBLISHED Reserved 2026-06-21 | Published 2026-06-21 | Updated 2026-06-21 | Assigner VulDB




MEDIUM: 5.3CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:P
MEDIUM: 4.3CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N/E:P/RL:X/RC:R
MEDIUM: 4.3CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N/E:P/RL:X/RC:R
5.0AV:N/AC:L/Au:N/C:N/I:P/A:N/E:POC/RL:ND/RC:UR

Problem types

Open Redirect

Timeline

2026-06-21:Advisory disclosed
2026-06-21:VulDB entry created
2026-06-21:VulDB entry last update

Credits

geochen (VulDB User) reporter

VulDB CNA Team coordinator

References

vuldb.com/vuln/372598 (VDB-372598 | lemonldap-ng SAML Common Domain Cookie Endpoint CDC.pm redirect) vdb-entry technical-description

vuldb.com/vuln/372598/cti (VDB-372598 | CTI Indicators (IOB, IOC, TTP, IOA)) signature permissions-required

vuldb.com/cve/CVE-2026-12804 (CVE-2026-12804 | CVE Analysis and Report) third-party-advisory

vuldb.com/submit/836105 (Submit #836105 | lemonldap lemonldap-ng ca7af863ac5f60d127ba01e8661c0365be374d4b Open Redirect) third-party-advisory

cve.org (CVE-2026-12804)

nvd.nist.gov (CVE-2026-12804)

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