{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "0"
              },
              {
                "fixed": "2.18.14"
              }
            ],
            "source": [
              "AFFECTED_FIELD",
              "REFERENCES"
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "aea1cf537b850509e802b388f38cf1482cb6291b"
            }
          ],
          "repo": "https://github.com/ridafkih/keeper.sh",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-mxxg-qffg-j3p6"
  ],
  "database_specific": {
    "cna_assigner": "VulnCheck",
    "cwe_ids": [
      "CWE-918"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/75xxx/CVE-2026-75583.json"
  },
  "details": "keeper.sh's calendar module version prior to 2.18.14 contains a server-side request forgery (SSRF) guard bypass vulnerability that allows authenticated attackers to reach private network addresses by exploiting a DNS rebinding attack against the two-phase URL validation and connection flow. The SSRF guard validates a hostname's resolved IP addresses but discards them before the actual HTTP connection is opened, allowing an attacker who controls authoritative DNS to return a public address during validation and a private address during the subsequent independent socket-level DNS resolution, causing the guard to pass while the outbound connection reaches internal infrastructure such as cloud instance metadata endpoints.",
  "id": "CVE-2026-75583",
  "modified": "2026-08-22T03:31:08.978204438Z",
  "published": "2026-08-19T16:35:53.999Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/75xxx/CVE-2026-75583.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/ridafkih/keeper.sh/security/advisories/GHSA-mxxg-qffg-j3p6"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-75583"
    },
    {
      "type": "ADVISORY",
      "url": "https://www.vulncheck.com/advisories/keeper-sh-calendar-version-prior-to-ssrf-guard-bypass-via-dns-rebinding"
    },
    {
      "type": "FIX",
      "url": "https://github.com/ridafkih/keeper.sh/commit/aea1cf537b850509e802b388f38cf1482cb6291b"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/ridafkih/keeper.sh"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:H/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:L/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "keeper.sh Calendar version prior to 2.18.14 SSRF Guard Bypass via DNS Rebinding"
}