Vulnerability-Lookup

CVE-2026-12804 (GCVE-0-2026-12804)

Vulnerability from cvelistv5 – Published: 2026-06-21 18:30 – Updated: 2026-06-22 15:52

Title

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

Summary

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."

Severity

5.3 (Medium)


                        
                          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

4.3 (Medium)


                        
                          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

4.3 (Medium)


                        
                          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

SSVC

Exploitation: poc Automatable: no Technical Impact: partial

CISA Coordinator (v2.0.3)

CWE

CWE-601 - Open Redirect

Assigner

VulDB

References

6 references

URL	Tags
https://vuldb.com/vuln/372598	vdb-entrytechnical-description
https://vuldb.com/vuln/372598/cti	signaturepermissions-required
https://vuldb.com/cve/CVE-2026-12804	third-party-advisory
https://vuldb.com/submit/836105	third-party-advisory
https://gitlab.ow2.org/lemonldap-ng/lemonldap-ng/…	related
https://gitlab.ow2.org/lemonldap-ng/lemonldap-ng/…	patch

Impacted products

1 product

Vendor	Product	Version
n/a	lemonldap-ng	Affected: 2.0 Affected: 2.1 Affected: 2.2 Affected: 2.3 Affected: 2.4 Affected: 2.5 Affected: 2.6 Affected: 2.7 Affected: 2.8 Affected: 2.9 Affected: 2.10 Affected: 2.11 Affected: 2.12 Affected: 2.13 Affected: 2.14 Affected: 2.15 Affected: 2.16 Affected: 2.17 Affected: 2.18 Affected: 2.19 Affected: 2.20 Affected: 2.21 Affected: 2.22 Affected: 2.23.0 cpe:2.3:a:lemonldap-ng:lemonldap-ng::::::::

Credits

geochen (VulDB User) VulDB CNA Team

Show details on NVD website

JSON

To clipboard

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                "id": "CVE-2026-12804",
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FKIE_CVE-2026-12804

Vulnerability from fkie_nvd - Published: 2026-06-21 19:16 - Updated: 2026-06-21 19:16

Severity

4.3 (Medium) - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N

Summary

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.

References

	URL	Tags
	cna@vuldb.com	https://vuldb.com/cve/CVE-2026-12804
	cna@vuldb.com	https://vuldb.com/submit/836105
	cna@vuldb.com	https://vuldb.com/vuln/372598
	cna@vuldb.com	https://vuldb.com/vuln/372598/cti

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "cpes": [
            "cpe:2.3:a:lemonldap-ng:lemonldap-ng:*:*:*:*:*:*:*:*"
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          "vendor": "n/a",
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    }
  ],
  "id": "CVE-2026-12804",
  "lastModified": "2026-06-21T19:16:23.097",
  "metrics": {
    "cvssMetricV2": [
      {
        "acInsufInfo": false,
        "baseSeverity": "MEDIUM",
        "cvssData": {
          "accessComplexity": "LOW",
          "accessVector": "NETWORK",
          "authentication": "NONE",
          "availabilityImpact": "NONE",
          "baseScore": 5.0,
          "confidentialityImpact": "NONE",
          "integrityImpact": "PARTIAL",
          "vectorString": "AV:N/AC:L/Au:N/C:N/I:P/A:N",
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        "impactScore": 2.9,
        "obtainAllPrivilege": false,
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        "type": "Secondary",
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    "cvssMetricV31": [
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          "modifiedSubIntegrityImpact": "NOT_DEFINED",
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          "modifiedVulnConfidentialityImpact": "NOT_DEFINED",
          "modifiedVulnIntegrityImpact": "NOT_DEFINED",
          "privilegesRequired": "NONE",
          "providerUrgency": "NOT_DEFINED",
          "subAvailabilityImpact": "NONE",
          "subConfidentialityImpact": "NONE",
          "subIntegrityImpact": "NONE",
          "userInteraction": "PASSIVE",
          "valueDensity": "NOT_DEFINED",
          "vectorString": "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",
          "version": "4.0",
          "vulnAvailabilityImpact": "NONE",
          "vulnConfidentialityImpact": "NONE",
          "vulnIntegrityImpact": "LOW",
          "vulnerabilityResponseEffort": "NOT_DEFINED"
        },
        "source": "cna@vuldb.com",
        "type": "Secondary"
      }
    ]
  },
  "published": "2026-06-21T19:16:23.097",
  "references": [
    {
      "source": "cna@vuldb.com",
      "url": "https://vuldb.com/cve/CVE-2026-12804"
    },
    {
      "source": "cna@vuldb.com",
      "url": "https://vuldb.com/submit/836105"
    },
    {
      "source": "cna@vuldb.com",
      "url": "https://vuldb.com/vuln/372598"
    },
    {
      "source": "cna@vuldb.com",
      "url": "https://vuldb.com/vuln/372598/cti"
    }
  ],
  "sourceIdentifier": "cna@vuldb.com",
  "vulnStatus": "Received",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-601"
        }
      ],
      "source": "cna@vuldb.com",
      "type": "Primary"
    }
  ]
}

GHSA-G4V8-Q2MR-M933

Vulnerability from github – Published: 2026-06-21 21:31 – Updated: 2026-06-22 18:34

Details

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.

Severity

4.3 (Medium)


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

2.1 (Low)


                  
                    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

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2026-12804"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-601"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-06-21T19:16:23Z",
    "severity": "LOW"
  },
  "details": "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.",
  "id": "GHSA-g4v8-q2mr-m933",
  "modified": "2026-06-22T18:34:11Z",
  "published": "2026-06-21T21:31:03Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-12804"
    },
    {
      "type": "WEB",
      "url": "https://gitlab.ow2.org/lemonldap-ng/lemonldap-ng/-/merge_requests/979"
    },
    {
      "type": "WEB",
      "url": "https://gitlab.ow2.org/lemonldap-ng/lemonldap-ng/-/work_items/3619"
    },
    {
      "type": "WEB",
      "url": "https://vuldb.com/cve/CVE-2026-12804"
    },
    {
      "type": "WEB",
      "url": "https://vuldb.com/submit/836105"
    },
    {
      "type": "WEB",
      "url": "https://vuldb.com/vuln/372598"
    },
    {
      "type": "WEB",
      "url": "https://vuldb.com/vuln/372598/cti"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N",
      "type": "CVSS_V3"
    },
    {
      "score": "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",
      "type": "CVSS_V4"
    }
  ]
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

Action not permitted

CVE-2026-12804 (GCVE-0-2026-12804)

FKIE_CVE-2026-12804

GHSA-G4V8-Q2MR-M933

Tags

Sightings

Nomenclature