{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "0"
              },
              {
                "fixed": "2.5.48"
              }
            ],
            "source": [
              "AFFECTED_FIELD",
              "REFERENCES"
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "a020fa47b"
            }
          ],
          "repo": "https://github.com/misp/misp",
          "type": "GIT"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "CIRCL",
    "cwe_ids": [
      "CWE-294"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/103xxx/CVE-2026-103655.json"
  },
  "details": "MISP contains a vulnerability in its two-factor authentication (TOTP) verification process that permits a valid one-time code to be accepted more than once within its time-based validity window.\n\nThe issue exists in the user login flow where a TOTP code is verified as a second authentication factor. Because the system did not record whether a given TOTP period had already been consumed, the same code remained valid for its entire time window (typically 30 seconds). An attacker who captures a legitimate code during a user's login could replay it to authenticate a second session as that user.\n\nPreconditions:\n\n- The target user has TOTP-based two-factor authentication enabled.\n\n- The attacker is in a position to observe or intercept the TOTP code during a legitimate login (e.g., network-level interception, shoulder surfing, or a compromised client).\n\n- The replay must occur within the TOTP validity period.\n\nSecurity impact:\n\n- Unauthorized account access by replaying a captured one-time code.\n\n- Potential compromise of threat-intelligence data and administrative functions accessible to the targeted user.\n\nAffected versions: \u003cv2.5.48.",
  "id": "CVE-2026-103655",
  "modified": "2026-10-04T02:30:14.561334340Z",
  "published": "2026-10-01T08:08:55.013Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/103xxx/CVE-2026-103655.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-103655"
    },
    {
      "type": "FIX",
      "url": "https://github.com/MISP/MISP/commit/a020fa47b"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/MISP/MISP"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "MISP TOTP Code Replay Allows Duplicate Authentication Within Validity Period"
}