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

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Summary

CVECVE-2026-12804
StatePUBLISHED
AssignerVulDB
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-06-21 19:16:23 UTC
Updated2026-06-22 18:24:24 UTC
DescriptionA 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."

Risk And Classification

Primary CVSS: v4.0 2.1 LOW from [email protected]

CVSS: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/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

EPSS: 0.002640000 probability, percentile 0.175820000 (date 2026-06-24)

Problem Types: CWE-601 | CWE-601 Open Redirect

VersionSourceTypeScoreSeverityVector
4.0[email protected]Secondary2.1LOWCVSS: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/C...
4.0CNADECLARED5.3MEDIUMCVSS: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
3.1[email protected]Secondary4.3MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N
3.1CNADECLARED4.3MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N/E:P/RL:O/RC:C
3.0CNADECLARED4.3MEDIUMCVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N/E:P/RL:O/RC:C
2.0[email protected]Secondary5AV:N/AC:L/Au:N/C:N/I:P/A:N
2.0CNADECLARED5AV:N/AC:L/Au:N/C:N/I:P/A:N/E:POC/RL:OF/RC:C

CVSS v4.0 Breakdown

Attack Vector
Network
Attack Complexity
Low
Attack Requirements
None
Privileges Required
None
User Interaction
Passive
Confidentiality
None
Integrity
Low
Availability
None
Sub Conf.
None
Sub Integrity
None
Sub Availability
None

CVSS: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/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
None
Integrity
Low
Availability
None

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N

CVSS v3.0 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
None
Integrity
Low
Availability
None

CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N/E:P/RL:O/RC:C

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Na Lemonldap-ng affected 2.0 Not specified
CNA Na Lemonldap-ng affected 2.1 Not specified
CNA Na Lemonldap-ng affected 2.2 Not specified
CNA Na Lemonldap-ng affected 2.3 Not specified
CNA Na Lemonldap-ng affected 2.4 Not specified
CNA Na Lemonldap-ng affected 2.5 Not specified
CNA Na Lemonldap-ng affected 2.6 Not specified
CNA Na Lemonldap-ng affected 2.7 Not specified
CNA Na Lemonldap-ng affected 2.8 Not specified
CNA Na Lemonldap-ng affected 2.9 Not specified
CNA Na Lemonldap-ng affected 2.10 Not specified
CNA Na Lemonldap-ng affected 2.11 Not specified
CNA Na Lemonldap-ng affected 2.12 Not specified
CNA Na Lemonldap-ng affected 2.13 Not specified
CNA Na Lemonldap-ng affected 2.14 Not specified
CNA Na Lemonldap-ng affected 2.15 Not specified
CNA Na Lemonldap-ng affected 2.16 Not specified
CNA Na Lemonldap-ng affected 2.17 Not specified
CNA Na Lemonldap-ng affected 2.18 Not specified
CNA Na Lemonldap-ng affected 2.19 Not specified
CNA Na Lemonldap-ng affected 2.20 Not specified
CNA Na Lemonldap-ng affected 2.21 Not specified
CNA Na Lemonldap-ng affected 2.22 Not specified
CNA Na Lemonldap-ng affected 2.23.0 Not specified

References

ReferenceSourceLinkTags
vuldb.com/vuln/372598/cti [email protected] vuldb.com
vuldb.com/submit/836105 [email protected] vuldb.com
gitlab.ow2.org/lemonldap-ng/lemonldap-ng/-/merge_requests/979 [email protected] gitlab.ow2.org
gitlab.ow2.org/lemonldap-ng/lemonldap-ng/-/work_items/3619 [email protected] gitlab.ow2.org
vuldb.com/cve/CVE-2026-12804 [email protected] vuldb.com
vuldb.com/vuln/372598 [email protected] vuldb.com
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Vendor Comments And Credit

Discovery Credit

CNA: geochen (VulDB User) (en)

CNA: VulDB CNA Team (en)

Additional Advisory Data

SourceTimeEvent
CNA2026-06-21T00:00:00.000ZAdvisory disclosed
CNA2026-06-21T02:00:00.000ZVulDB entry created
CNA2026-06-22T17:56:58.000ZVulDB entry last update
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