Rate limiter not working reliable when Memcached is installed in Nextcloud

{
  "id": "f14405e22d8f9917a92caf19edfc1565c78df13b0767084919bc0b01d025e4c1",
  "url": "https://osv.dev/vulnerability/CVE-2023-45148",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Rate limiter not working reliable when Memcached is installed in Nextcloud",
    "summary": "Nextcloud is an open source home cloud server. When Memcached is used as `memcache.distributed` the rate limiting in Nextcloud Server could be reset unexpectedly resetting the rate count earlier than intended. Users are advised to upgrade to versions 25.0.11, 26.0.6 or 27.1.0. Users unable to upgrade should change their config setting `memcache.distributed` to `\\OC\\Memcache\\Redis` and install Redis instead of Memcached.",
    "evidence": "osv:CVE-2023-45148",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2023-45148",
      "aliases": [
        "CVE-2023-45148",
        "GHSA-xmhp-7vr4-hp63"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/nextcloud/server",
              "type": "GIT",
              "events": [
                {
                  "introduced": "20ea9a25353129b56d46951fe7d23939665ab2b2"
                },
                {
                  "fixed": "97d754dcf1aa3f166ead03a9f6a9165270c73647"
                },
                {
                  "introduced": "62cfd3b4c9ff4d8cdbbe6dcc8b63a1085bb94e3d"
                },
                {
                  "fixed": "1f6197544b21d1dc9d4cae54a5311b5992e666c6"
                },
                {
                  "introduced": "add4e4365a4040d2e4e6aa79c0d03c3edd78583c"
                },
                {
                  "last_affected": "add4e4365a4040d2e4e6aa79c0d03c3edd78583c"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:nextcloud:nextcloud_server:*:*:*:*:-:*:*:*",
                    "range": [
                      {
                        "introduced": "25.0.0"
                      },
                      {
                        "fixed": "25.0.11"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "cpe": "cpe:2.3:a:nextcloud:nextcloud_server:*:*:*:*:enterprise:*:*:*",
                    "range": [
                      {
                        "introduced": "25.0.0"
                      },
                      {
                        "fixed": "25.0.11"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "cpe": "cpe:2.3:a:nextcloud:nextcloud_server:*:*:*:*:-:*:*:*",
                    "range": [
                      {
                        "introduced": "26.0.0"
                      },
                      {
                        "fixed": "26.0.6"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "cpe": "cpe:2.3:a:nextcloud:nextcloud_server:*:*:*:*:enterprise:*:*:*",
                    "range": [
                      {
                        "introduced": "26.0.0"
                      },
                      {
                        "fixed": "26.0.6"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "cpe": "cpe:2.3:a:nextcloud:nextcloud_server:27.0.0:*:*:*:-:*:*:*",
                    "range": [
                      {
                        "introduced": "27.0.0"
                      },
                      {
                        "last_affected": "27.0.0"
                      }
                    ],
                    "source": "CPE_STRING"
                  },
                  {
                    "cpe": "cpe:2.3:a:nextcloud:nextcloud_server:27.0.0:*:*:*:enterprise:*:*:*",
                    "range": [
                      {
                        "introduced": "27.0.0"
                      },
                      {
                        "last_affected": "27.0.0"
                      }
                    ],
                    "source": "CPE_STRING"
                  }
                ]
              }
            }
          ],
          "versions": [
            "27.0.0",
            "v25.0.11rc1",
            "v26.0.6rc1",
            "v25.0.10",
            "v26.0.5",
            "v25.0.10rc1",
            "v26.0.5rc1",
            "v25.0.9",
            "v26.0.4",
            "v25.0.9rc2",
            "v26.0.4rc2",
            "v26.0.4rc1",
            "v25.0.9rc1",
            "v25.0.8",
            "v26.0.3",
            "v25.0.8rc2",
            "v26.0.3rc2",
            "v25.0.8rc1",
            "v26.0.3rc1",
            "v27.0.0",
            "v25.0.7",
            "v26.0.2",
            "v25.0.7rc1",
            "v26.0.2rc1",
            "v25.0.6",
            "v26.0.1",
            "v25.0.6rc1",
            "v26.0.1rc1",
            "v25.0.5",
            "v26.0.0",
            "v25.0.5rc1",
            "v25.0.4",
            "v25.0.4rc1",
            "v25.0.3",
            "v25.0.3rc2",
            "v25.0.3rc1",
            "v25.0.2",
            "v25.0.2rc3",
            "v25.0.2rc2",
            "v25.0.2rc1",
            "v25.0.1",
            "v25.0.1rc1",
            "v25.0.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2023-45148.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:24.402218153Z",
      "provider": "osv",
      "references": [
        "https://hackerone.com/reports/2110945",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/45xxx/CVE-2023-45148.json",
        "https://github.com/nextcloud/security-advisories/security/advisories/GHSA-xmhp-7vr4-hp63",
        "https://nvd.nist.gov/vuln/detail/CVE-2023-45148",
        "https://github.com/nextcloud/server/pull/40293"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-307"
        ],
        "cna_assigner": "GitHub_M",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/45xxx/CVE-2023-45148.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2023-45148",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 490901,
  "published_at": "2023-10-16T18:51:56.827+00:00"
}