OpenClaw 2026.4.9 < 2026.4.10 - Sender Policy Bypass in Host Media Attachment Reads

{
  "id": "3c123b77e8fa75e88619e973f48745337743de5fde2a56df6bbcbb8381f57557",
  "url": "https://osv.dev/vulnerability/CVE-2026-42438",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "OpenClaw 2026.4.9 < 2026.4.10 - Sender Policy Bypass in Host Media Attachment Reads",
    "summary": "OpenClaw versions 2026.4.9 before 2026.4.10 contain a sender policy bypass vulnerability in the outbound host-media attachment read helper that allows unauthorized local file disclosure. Attackers with denied read access via toolsBySender or group policy can trigger host-media attachment loading to bypass sender and group-scoped authorization boundaries and retrieve readable local files through the outbound media path.",
    "evidence": "osv:CVE-2026-42438",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2026-42438",
      "aliases": [
        "CVE-2026-42438",
        "GHSA-jhpv-5j76-m56h"
      ],
      "metrics": [
        {
          "type": "CVSS_V4",
          "score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:L/VI:N/VA:N/SC:H/SI:N/SA:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/openclaw/openclaw",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0512059dd4e6d2e582393828b837c376ddc4719c"
                },
                {
                  "fixed": "44e5b62c27e088128e32e209c146de346c3ea7e6"
                },
                {
                  "fixed": "c949af9fabf3873b5b7c484090cb5f5ab6049a98"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "2026.4.9"
                      },
                      {
                        "fixed": "2026.4.10"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandardRange"
                  },
                  {
                    "range": [
                      {
                        "fixed": "c949af9fabf3873b5b7c484090cb5f5ab6049a98"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  }
                ]
              }
            }
          ],
          "versions": [
            "2026.4.9",
            "v2026.4.9"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-42438.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:23.728371045Z",
      "provider": "osv",
      "references": [
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/42xxx/CVE-2026-42438.json",
        "https://github.com/openclaw/openclaw/security/advisories/GHSA-jhpv-5j76-m56h",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-42438",
        "https://www.vulncheck.com/advisories/openclaw-sender-policy-bypass-in-host-media-attachment-reads",
        "https://github.com/openclaw/openclaw/commit/c949af9fabf3873b5b7c484090cb5f5ab6049a98"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-863"
        ],
        "cna_assigner": "VulnCheck",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/42xxx/CVE-2026-42438.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-42438",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 490083,
  "published_at": "2026-05-05T11:24:56.718+00:00"
}