Meeting Room Booking System has an unauthenticated open redirect

{
  "id": "15d7b196a27ee7a978dea08477f14dd630311616eef44b43ace1e48c21e11d2f",
  "url": "https://osv.dev/vulnerability/CVE-2026-46688",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Meeting Room Booking System has an unauthenticated open redirect",
    "summary": "The Meeting Room Booking System (MRBS) is a PHP-based application for booking meeting rooms. Prior to version 1.12.2, an unauthenticated request can be made to redirect the user to a query-specified location. This allows an attacker to create a specially-crafted URL to an MRBS installation that will cause the user who clicks it to be redirected to the attacker-specified redirect URL, which could be a spoofed MRBS login page, for example. Version 1.12.2 contains a fix. No known workarounds are available.",
    "evidence": "osv:CVE-2026-46688",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2026-46688",
      "aliases": [
        "CVE-2026-46688",
        "GHSA-6xcj-g522-859f"
      ],
      "metrics": [
        {
          "type": "CVSS_V4",
          "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/meeting-room-booking-system/mrbs-code",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "38d51e05f4a0ab39820f3830ca5dcae5f34d8546"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "1.12.2"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StringRangeExpression"
                  },
                  {
                    "range": [
                      {
                        "fixed": "38d51e05f4a0ab39820f3830ca5dcae5f34d8546"
                      }
                    ],
                    "source": "REFERENCES_TAG",
                    "original_tag": "v1.12.2"
                  },
                  {
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "1.12.2"
                      }
                    ],
                    "source": "DESCRIPTION"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v1.11.6",
            "v1.11.5",
            "v1.11.2",
            "v1.11.1",
            "mrbs-1_11_0",
            "mrbs-1_9_4",
            "mrbs-1_9_3",
            "mrbs-1_9_2",
            "mrbs-1_9_1",
            "mrbs-1_9_0",
            "mrbs-1_8_0",
            "mrbs-1_7_2",
            "mrbs-1_7_1",
            "mrbs-1_7_0",
            "mrbs-1_6_0",
            "mrbs-1_5_0",
            "mrbs-1_4_11",
            "mrbs-1_4_10",
            "mrbs-1_4_9",
            "mrbs-1_4_8",
            "mrbs-1_4_7",
            "mrbs-1_4_6",
            "mrbs-1_4_5",
            "mrbs-1_4_5rc2",
            "mrbs-1_4_5rc1",
            "mrbs-1_4_4_1",
            "mrbs-1_4_4",
            "mrbs-1_4_3",
            "mrbs-1_4_2",
            "mrbs-1_4_2rc1",
            "mrbs-1_4_1",
            "mrbs-1_4",
            "mrbs-1_4beta2",
            "mrbs-1_4beta1",
            "mrbs-1_4_b1",
            "mrbs-1_2_6_1",
            "mrbs-1_2_6",
            "mrbs-1_2_5",
            "mrbs-1_2_4",
            "mrbs-1_2_3",
            "mrbs-1_2_2",
            "mrbs-1_2_1",
            "mrbs-1_2"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-46688.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:30.842872498Z",
      "provider": "osv",
      "references": [
        "https://github.com/meeting-room-booking-system/mrbs-code/releases/tag/v1.12.2",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/46xxx/CVE-2026-46688.json",
        "https://github.com/meeting-room-booking-system/mrbs-code/security/advisories/GHSA-6xcj-g522-859f",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-46688"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-601"
        ],
        "cna_assigner": "GitHub_M",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/46xxx/CVE-2026-46688.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-46688",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 497864,
  "published_at": "2026-08-12T23:30:25.563+00:00"
}