CodeWhale before 0.8.64 SSRF Bypass via DNS Pinning TOCTOU

{
  "id": "f0164179e61d921b5883e082fd816461e7f3d0034228cdfc382152969a00e686",
  "url": "https://osv.dev/vulnerability/CVE-2026-75856",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CodeWhale before 0.8.64 SSRF Bypass via DNS Pinning TOCTOU",
    "summary": "CodeWhale before 0.8.64 contains a server-side request forgery bypass vulnerability in DNS pinning logic that fails to prevent time-of-check-time-of-use attacks. Attackers can manipulate DNS responses to fail initial resolution checks and succeed on secondary requests, allowing requests to internal IP addresses and bypassing SSRF mitigations.",
    "evidence": "osv:CVE-2026-75856",
    "products": [],
    "severity": "critical",
    "structured": {
      "id": "CVE-2026-75856",
      "aliases": [
        "CVE-2026-75856",
        "GHSA-6v2g-fpxh-pmmh"
      ],
      "metrics": [
        {
          "type": "CVSS_V4",
          "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:H/SI:N/SA:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/codewhale-hq/Codewhale",
              "type": "GIT",
              "events": [
                {
                  "introduced": "2d61513a9ea762fd2ffb3565e0dd819a400e8532"
                },
                {
                  "fixed": "5fa24733e9a1d11315506309b8edb0fdf2b94f04"
                },
                {
                  "introduced": "5fa24733e9a1d11315506309b8edb0fdf2b94f04"
                },
                {
                  "fixed": "9d2e6a89f58610d5f426ff26533a2bf312023790"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "0.8.5"
                      },
                      {
                        "fixed": "0.8.41"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandardRange"
                  },
                  {
                    "range": [
                      {
                        "introduced": "0.8.41"
                      },
                      {
                        "fixed": "0.8.64"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandardRange"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v0.8.40",
            "v0.8.39",
            "v0.8.38",
            "v0.8.37",
            "v0.8.36",
            "v0.8.35",
            "v0.8.33",
            "v0.8.32",
            "v0.8.31",
            "v0.8.30",
            "v0.8.28",
            "v0.8.29",
            "v0.8.27",
            "v0.8.26",
            "v0.8.25",
            "v0.8.24",
            "v0.8.23",
            "v0.8.22",
            "v0.8.21",
            "v0.8.20",
            "v0.8.19",
            "v0.8.18",
            "v0.8.17",
            "v0.8.15",
            "v0.8.14",
            "v0.8.13",
            "v0.8.12",
            "v0.8.11",
            "v0.8.10",
            "v0.8.9",
            "v0.8.8",
            "v0.8.7",
            "v0.8.6",
            "v0.8.5"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-75856.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:30.291079639Z",
      "provider": "osv",
      "references": [
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/75xxx/CVE-2026-75856.json",
        "https://github.com/Hmbown/CodeWhale/security/advisories/GHSA-6v2g-fpxh-pmmh",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-75856",
        "https://www.vulncheck.com/advisories/codewhale-before-ssrf-bypass-via-dns-pinning-toctou",
        "https://github.com/Hmbown/CodeWhale/commit/26de44a8bd5051f8f944ea60b2c37ae1d2b7d25e"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-918"
        ],
        "cna_assigner": "VulnCheck",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/75xxx/CVE-2026-75856.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-75856",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 497290,
  "published_at": "2026-08-18T15:21:55.627+00:00"
}