Skip to content
Heist/ feed
Back to feed
High

OTP bypass via plugin-based LDAP authentication in MISP when LDAP mixed authentication is enabled

Type: advisorySources: OSV

An authentication bypass vulnerability exists in MISP when LDAP mixed authentication is enabled with OTP enforcement. In deployments configured with LdapAuth.mixedAuth=true and Security.require_otp=true, users authenticated through an authentication plugin, such as LDAP, may have their authenticated session established during the application beforeFilter phase before the normal login flow enforces the OTP challenge. As a result, an attacker with valid primary authentication credentials could bypass the required OTP step by authenticating through the plugin-backed login flow and then directly accessing another application URL instead of completing the OTP verification page. This allows access to the application as the affected user without providing a valid TOTP, HOTP, or email OTP code. The issue affects configurations where plugin-based authentication is enabled and OTP is expected to be mandatory. The fix ensures that OTP requirements are checked immediately after plugin authentication and before the user session is established, redirecting users to the appropriate OTP challenge when required.

Products
Not specified
Affected versions
Not specified
Fixed versions
Not specified
CVEs
CVE-2026-10611
Confirmed fixed CVEs
Not specified
Updated in this feed
4 Nov 2026, 03:04 UTC · Revision 1

Source evidence

OTP bypass via plugin-based LDAP authentication in MISP when LDAP mixed authentication is enabled

core-osv · Original source

Published 2 Jun 2026, 12:48 UTC

An authentication bypass vulnerability exists in MISP when LDAP mixed authentication is enabled with OTP enforcement. In deployments configured with LdapAuth.mixedAuth=true and Security.require_otp=true, users authenticated through an authentication plugin, such as LDAP, may have their authenticated session established during the application beforeFilter phase before the normal login flow enforces the OTP challenge. As a result, an attacker with valid primary authentication credentials could bypass the required OTP step by authenticating through the plugin-backed login flow and then directly accessing another application URL instead of completing the OTP verification page. This allows access to the application as the affected user without providing a valid TOTP, HOTP, or email OTP code. The issue affects configurations where plugin-based authentication is enabled and OTP is expected to be mandatory. The fix ensures that OTP requirements are checked immediately after plugin authentication and before the user session is established, redirecting users to the appropriate OTP challenge when required.

osv:CVE-2026-10611
Complete source record
{
  "id": "14fc8a4233eff18c372e364c1904b0d1a4de098d888873e1d56f983322a85023",
  "url": "https://osv.dev/vulnerability/CVE-2026-10611",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "OTP bypass via plugin-based LDAP authentication in MISP when LDAP mixed authentication is enabled",
    "summary": "An authentication bypass vulnerability exists in MISP when LDAP mixed authentication is enabled with OTP enforcement. In deployments configured with LdapAuth.mixedAuth=true and Security.require_otp=true, users authenticated through an authentication plugin, such as LDAP, may have their authenticated session established during the application beforeFilter phase before the normal login flow enforces the OTP challenge. As a result, an attacker with valid primary authentication credentials could bypass the required OTP step by authenticating through the plugin-backed login flow and then directly accessing another application URL instead of completing the OTP verification page. This allows access to the application as the affected user without providing a valid TOTP, HOTP, or email OTP code. The issue affects configurations where plugin-based authentication is enabled and OTP is expected to be mandatory. The fix ensures that OTP requirements are checked immediately after plugin authentication and before the user session is established, redirecting users to the appropriate OTP challenge when required.",
    "evidence": "osv:CVE-2026-10611",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2026-10611",
      "aliases": [
        "CVE-2026-10611"
      ],
      "metrics": [
        {
          "type": "CVSS_V4",
          "score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:L/SI:N/SA:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/misp/misp",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "82e9c4f22879e3f32f60f5857aac0e829152bc76"
                },
                {
                  "fixed": "39b3cb15aac4318afdd2ab63b96c2eac12b271fe"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:misp-project:misp:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "2.5.39"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "range": [
                      {
                        "fixed": "39b3cb15aac4318afdd2ab63b96c2eac12b271fe"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v2.5.37",
            "v2.5.36",
            "v2.5.35",
            "v2.5.34",
            "v2.5.33",
            "v2.5.32",
            "v2.5.31",
            "v2.5.30",
            "v2.5.29",
            "v2.5.28",
            "v2.5.27",
            "v2.5.26",
            "v2.5.25",
            "v2.5.24",
            "v2.5.23",
            "v2.5.22",
            "v2.5.21",
            "v2.5.20",
            "v2.5.19",
            "v2.5.18",
            "v2.5.17",
            "v2.5.16",
            "v2.5.15",
            "v2.5.12",
            "v2.5.14",
            "v2.5.13",
            "v2.5.11",
            "v2.5.10",
            "v2.5.9",
            "v2.5.8",
            "v2.5.7",
            "v2.5.0",
            "v2.4.196",
            "v2.4.195",
            "v2.4.194",
            "v2.4.193",
            "v2.4.192",
            "v2.4.191",
            "v2.4.190",
            "v2.4.189",
            "v2.4.188",
            "v2.4.187",
            "v2.4.186",
            "v2.4.175",
            "v2.4.185",
            "v2.4.183",
            "v2.4.184",
            "v2.4.153",
            "v2.4.152",
            "v2.4.137",
            "v2.4.136",
            "v2.4.134",
            "v2.4.133",
            "v2.4.130",
            "v2.4.128",
            "v2.4.127",
            "v2.4.125",
            "v2.4.123",
            "v2.4.122",
            "v2.4.121",
            "v2.4.120",
            "v2.4.118",
            "v2.4.111",
            "rm",
            "v2.4.110",
            "v2.4.109",
            "codename/tellurium",
            "v2.4.107",
            "v2.4.106",
            "v2.4.102",
            "v2.4.101",
            "v2.4.100",
            "v2.4.98",
            "v2.4.96",
            "v2.4.95",
            "v2.4.94",
            "v2.4.93",
            "v2.4.91",
            "v2.4.89",
            "v2.4.88",
            "v2.4.87",
            "v2.4.86",
            "v2.4.85",
            "v2.4.83",
            "v2.4.82",
            "v2.4.80",
            "v2.4.78",
            "v2.4.65",
            "v2.4.64",
            "v2.4.63",
            "v2.4.62",
            "v2.4.61",
            "v2.4.60",
            "v2.4.59",
            "v2.4.58",
            "v2.4.57",
            "v2.4.56",
            "v2.4.54",
            "v2.4.53",
            "v2.4.52",
            "v2.4.51",
            "v2.4.50",
            "v2.4.48",
            "v2.4.47",
            "v2.4.46",
            "v2.4.45",
            "v2.4.43",
            "v2.4.39",
            "v2.4.38",
            "v2.4.37",
            "v2.4.36",
            "v2.4.35",
            "v2.4.34",
            "v2.4.27",
            "v2.4.26",
            "v2.4.25",
            "v2.4.24",
            "v2.4.23",
            "v2.4.22",
            "v2.4.21",
            "v2.4.20",
            "v2.4.18",
            "v2.4.17",
            "v2.4.16",
            "v2.4.15",
            "v2.4.14",
            "v2.4.13",
            "v2.4.11",
            "v2.4.10",
            "v2.4.9",
            "v2.4.7",
            "v2.4.5",
            "v2.4.4",
            "v2.4.3",
            "v2.4.2",
            "v2.4.1",
            "v2.4.0",
            "v2.3.0",
            "v0.2"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-10611.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:32.811234030Z",
      "provider": "osv",
      "references": [
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/10xxx/CVE-2026-10611.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-10611",
        "https://github.com/MISP/MISP/commit/39b3cb15aac4318afdd2ab63b96c2eac12b271fe"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-287"
        ],
        "cna_assigner": "CIRCL",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/10xxx/CVE-2026-10611.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-10611",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 499859,
  "published_at": "2026-06-02T12:48:11.462+00:00"
}