Trusted Domain Project OpenDMARC SPF Macro opendmarc_spf.c opendmarc_sp2_find_mailfrom_domain improper authentication

{
  "id": "94d106a06d61ce73933e74ede7cbe5534256bdcf9b84997df0330942297ec950",
  "url": "https://osv.dev/vulnerability/CVE-2026-101281",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Trusted Domain Project OpenDMARC SPF Macro opendmarc_spf.c opendmarc_sp2_find_mailfrom_domain improper authentication",
    "summary": "A flaw has been found in Trusted Domain Project OpenDMARC up to 1.4.2. Affected by this vulnerability is the function opendmarc_sp2_find_mailfrom_domain of the file libopendmarc/opendmarc_spf.c of the component SPF Macro Handler. This manipulation causes improper authentication. The attack is possible to be carried out remotely. The exploit has been published and may be used. Patch name: c48a74c758677fc5272a73eff15ffdbf8afda1a6. Applying a patch is the recommended action to fix this issue.",
    "evidence": "osv:CVE-2026-101281",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2026-101281",
      "aliases": [
        "CVE-2026-101281"
      ],
      "metrics": [
        {
          "type": "CVSS_V4",
          "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/trusteddomainproject/opendmarc",
              "type": "GIT",
              "events": [
                {
                  "introduced": "a29adab78ea9b6625066fdc482eae0ec6aa19ca6"
                },
                {
                  "fixed": "c48a74c758677fc5272a73eff15ffdbf8afda1a6"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "1.4.0"
                      },
                      {
                        "last_affected": "1.4.0"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandaloneSingleVersion"
                  },
                  {
                    "range": [
                      {
                        "introduced": "1.4.1"
                      },
                      {
                        "last_affected": "1.4.1"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandaloneSingleVersion"
                  },
                  {
                    "range": [
                      {
                        "introduced": "1.4.2"
                      },
                      {
                        "last_affected": "1.4.2"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandaloneSingleVersion"
                  },
                  {
                    "range": [
                      {
                        "fixed": "c48a74c758677fc5272a73eff15ffdbf8afda1a6"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  }
                ]
              }
            }
          ],
          "versions": [
            "1.4.0",
            "1.4.1",
            "1.4.2",
            "rel-opendmarc-1-4-0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-101281.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:52.326975939Z",
      "provider": "osv",
      "references": [
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/101xxx/CVE-2026-101281.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-101281",
        "https://vuldb.com/cve/CVE-2026-101281",
        "https://vuldb.com/submit/918284",
        "https://vuldb.com/vuln/411038",
        "https://github.com/trusteddomainproject/OpenDMARC/issues/262",
        "https://vuldb.com/vuln/411038/cti",
        "https://github.com/trusteddomainproject/OpenDMARC/commit/c48a74c758677fc5272a73eff15ffdbf8afda1a6",
        "https://github.com/trusteddomainproject/OpenDMARC/pull/328",
        "https://xuyongzhe-vt.github.io/share/opendmarc-spf-postmaster-macro.html"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-287"
        ],
        "cna_assigner": "VulDB",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/101xxx/CVE-2026-101281.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-101281",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 521237,
  "published_at": "2026-09-29T00:45:11.946+00:00"
}