{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "0"
              },
              {
                "fixed": "12.128.2"
              }
            ],
            "source": [
              "AFFECTED_FIELD",
              "DESCRIPTION"
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "6685e5f11adef257bf3d085e481f4d8ebcec602e"
            }
          ],
          "repo": "https://github.com/Cap-go/capgo.app",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-42vv-8j94-24wj"
  ],
  "database_specific": {
    "cna_assigner": "VulnCheck",
    "cwe_ids": [
      "CWE-20"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/56xxx/CVE-2026-56306.json"
  },
  "details": "Capgo before 12.128.2 contains a weak parsing vulnerability in the x-limited-key-id header that allows attackers to bypass subkey enforcement by submitting malformed values, zero, or duplicate headers that result in NaN or falsy values. Remote attackers can manipulate the x-limited-key-id header to disable limited key scoping and execute requests using the main API key context instead of restricted subkey permissions.",
  "id": "CVE-2026-56306",
  "modified": "2026-08-12T03:51:40.160453892Z",
  "published": "2026-06-22T21:04:46.832Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/56xxx/CVE-2026-56306.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/Cap-go/capgo/security/advisories/GHSA-42vv-8j94-24wj"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-56306"
    },
    {
      "type": "ADVISORY",
      "url": "https://www.vulncheck.com/advisories/capgo-subkey-enforcement-bypass-via-x-limited-key-id-header-parsing"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "Capgo - Subkey Enforcement Bypass via x-limited-key-id Header Parsing"
}