{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "1.12.0"
              },
              {
                "fixed": "1.12.25"
              },
              {
                "introduced": "1.13.0"
              },
              {
                "fixed": "1.13.17"
              },
              {
                "introduced": "1.14.0"
              },
              {
                "fixed": "1.14.20"
              },
              {
                "introduced": "2.0.0"
              },
              {
                "fixed": "2.1.16"
              },
              {
                "introduced": "2.2.0"
              },
              {
                "fixed": "2.2.9"
              }
            ],
            "source": "AFFECTED_FIELD"
          },
          "events": [
            {
              "introduced": "74dd42a09e50620a5f54f9a01676e003160d9f3a"
            },
            {
              "fixed": "b3561f3fbd6a2b10d8d5bd7532b7cadecadb6fa7"
            },
            {
              "introduced": "c8799bea638c5e4ab07a28f66f628d38d8174b41"
            },
            {
              "fixed": "5c7dbe3788f259abbdd7d62a4f281439c6b85bb1"
            },
            {
              "introduced": "57dcd9e53275a880c77d4ec2c4fad9f567f420be"
            },
            {
              "fixed": "1f9bcfa25348479135b5927b4ecfadfd22f97dc8"
            },
            {
              "introduced": "6dd3ca9895be7ab7e6cb71f37af2ef66af17cbe0"
            },
            {
              "fixed": "439a8f66dbf05f369337dc8358e2698d57aba663"
            },
            {
              "introduced": "7aa47be3a617f75337d73d245352ea700bc8a1ef"
            },
            {
              "fixed": "253169df80a8c8babf479c6de5ce3d422e37dc6a"
            }
          ],
          "repo": "https://github.com/sylius/sylius",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-77w3-2367-7xvq"
  ],
  "database_specific": {
    "cna_assigner": "VulnCheck",
    "cwe_ids": [
      "CWE-640"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/100xxx/CVE-2026-100870.json"
  },
  "details": "Sylius versions before 1.12.25, 1.13.17, 1.14.20, 2.1.16, and 2.2.9 build administrator password-reset links using the request Host header without validation, allowing unauthenticated attackers to redirect reset tokens to attacker-controlled domains. Attackers can request password resets for known administrator email addresses with forged Host headers to intercept valid reset tokens and take over administrator accounts.",
  "id": "CVE-2026-100870",
  "modified": "2026-10-01T03:31:03.403018019Z",
  "published": "2026-09-27T13:09:54.715Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://packagist.org"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/100xxx/CVE-2026-100870.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/Sylius/Sylius/releases/tag/v2.2.9"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/Sylius/Sylius/security/advisories/GHSA-77w3-2367-7xvq"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-100870"
    },
    {
      "type": "ADVISORY",
      "url": "https://www.vulncheck.com/advisories/sylius-before-1.12.25-1.13.17-1.14.20-2.1.16-and-2.2.9-admin-password-reset-poisoning-via-host-header"
    },
    {
      "type": "FIX",
      "url": "https://github.com/Sylius/Sylius/commit/1255d75b20d3d88a5e5c8d46791504134c838480"
    },
    {
      "type": "FIX",
      "url": "https://github.com/Sylius/Sylius/pull/19215"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/Sylius/Sylius"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "Sylius before 1.12.25, 1.13.17, 1.14.20, 2.1.16, and 2.2.9 Admin Password Reset Poisoning via Host Header"
}