{
  "containers": {
    "cna": {
      "affected": [
        {
          "product": "openproject",
          "vendor": "opf",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 17.3.3"
            },
            {
              "status": "affected",
              "version": "\u003e= 17.4.0, \u003c 17.4.1"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "OpenProject is open-source, web-based project management software. Prior to 17.3.3 and 17.4.1, OpenProject\u0027s Storages module writes the OneDrive/SharePoint userless OAuth access_token plaintext to Rails.cache under the deterministic key storage.\u003cid\u003e.httpx_access_token, repopulated continuously by an hourly cron and every userless-OAuth call site (see Write cadence). None of the three allowed cache backends (file_store, memcache, redis) encrypts at rest. An attacker with read access to the cache backend recovers the Azure-AD application-tier bearer with an anonymous get over the memcached binary protocol (or the equivalent against Redis). This vulnerability is fixed in 17.3.3 and 17.4.1."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "HIGH",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 8.2,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "LOW",
            "scope": "CHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:N",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-313",
              "description": "CWE-313: Cleartext Storage in a File or on Disk",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-06-26T18:57:58.860Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/opf/openproject/security/advisories/GHSA-h83w-5q5x-pq27",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/opf/openproject/security/advisories/GHSA-h83w-5q5x-pq27"
        }
      ],
      "source": {
        "advisory": "GHSA-h83w-5q5x-pq27",
        "discovery": "UNKNOWN"
      },
      "title": "OpenProject: Information Disclosure (cleartext storage of data) on localhost through memcached via Others \"storage.\u003cid\u003e.httpx_access_token\" leads to Sensitive Data Exposure"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-52783",
    "datePublished": "2026-06-26T18:57:58.860Z",
    "dateReserved": "2026-06-08T17:13:43.065Z",
    "dateUpdated": "2026-06-26T18:57:58.860Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-52783",
      "date": "2026-06-14",
      "epss": "0.00034",
      "percentile": "0.10572"
    }
  }
}