{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "0"
              },
              {
                "fixed": "26.5.0"
              }
            ],
            "source": "AFFECTED_FIELD"
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "4c62e2a75d48deb06d45e7ed89a2b9ddfd187e3d"
            }
          ],
          "repo": "https://github.com/actualbudget/actual",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-49v6-pqjq-xw55"
  ],
  "database_specific": {
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
      "CWE-863"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/42xxx/CVE-2026-42604.json"
  },
  "details": "Actual is a local-first personal finance tool. The `POST /openid/config` endpoint in Actual Budget's sync-server versions \u003c= 26.4.0 exposes the full OpenID Connect configuration—including the OAuth2 `client_secret`—to any caller who knows the bootstrap password. The endpoint also lacks authentication and rate limiting, making the bootstrap password brute-forceable. Version 26.5.0 fixes the issue.",
  "id": "CVE-2026-42604",
  "modified": "2026-07-15T01:49:13.280052394Z",
  "published": "2026-06-12T18:42:38.346Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/42xxx/CVE-2026-42604.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/actualbudget/actual/security/advisories/GHSA-49v6-pqjq-xw55"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-42604"
    },
    {
      "type": "ARTICLE",
      "url": "https://actualbudget.org/blog/release-26.5.0"
    }
  ],
  "schema_version": "1.8.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:U",
      "type": "CVSS_V4"
    }
  ],
  "summary": "Actual has an OpenID `client_secret` Disclosure via Broken Authorization Guard in `/openid/config`"
}