{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-24400",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-01-27T21:36:16.298177Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-01-27T21:36:26.716Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "assertj",
          "vendor": "assertj",
          "versions": [
            {
              "status": "affected",
              "version": "\u003e= 1.4.0, \u003c 3.27.7"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "AssertJ provides Fluent testing assertions for Java and the Java Virtual Machine (JVM). Starting in version 1.4.0 and prior to version 3.27.7, an XML External Entity (XXE) vulnerability exists in `org.assertj.core.util.xml.XmlStringPrettyFormatter`: the `toXmlDocument(String)` method initializes `DocumentBuilderFactory` with default settings, without disabling DTDs or external entities. This formatter is used by the `isXmlEqualTo(CharSequence)` assertion for `CharSequence` values. An application is vulnerable only when it uses untrusted XML input with either `isXmlEqualTo(CharSequence)` from `org.assertj.core.api.AbstractCharSequenceAssert` or `xmlPrettyFormat(String)` from `org.assertj.core.util.xml.XmlStringPrettyFormatter`. If untrusted XML input is processed by tone of these methods, an attacker couldnread arbitrary local files via `file://` URIs (e.g., `/etc/passwd`, application configuration files); perform Server-Side Request Forgery (SSRF) via HTTP/HTTPS URIs, and/or cause Denial of Service via \"Billion Laughs\" entity expansion attacks. `isXmlEqualTo(CharSequence)` has been deprecated in favor of XMLUnit in version 3.18.0 and will be removed in version 4.0. Users of affected versions should, in order of preference: replace `isXmlEqualTo(CharSequence)` with XMLUnit, upgrade to version 3.27.7, or avoid using `isXmlEqualTo(CharSequence)` or `XmlStringPrettyFormatter` with untrusted input. `XmlStringPrettyFormatter` has historically been considered a utility for `isXmlEqualTo(CharSequence)` rather than a feature for AssertJ users, so it is deprecated in version 3.27.7 and removed in version 4.0, with no replacement."
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "attackComplexity": "LOW",
            "attackRequirements": "NONE",
            "attackVector": "LOCAL",
            "baseScore": 8.2,
            "baseSeverity": "HIGH",
            "privilegesRequired": "LOW",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "HIGH",
            "subIntegrityImpact": "NONE",
            "userInteraction": "NONE",
            "vectorString": "CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:L/SC:H/SI:N/SA:N",
            "version": "4.0",
            "vulnAvailabilityImpact": "LOW",
            "vulnConfidentialityImpact": "HIGH",
            "vulnIntegrityImpact": "NONE"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-611",
              "description": "CWE-611: Improper Restriction of XML External Entity Reference",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-01-26T22:19:02.161Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/assertj/assertj/security/advisories/GHSA-rqfh-9r24-8c9r",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/assertj/assertj/security/advisories/GHSA-rqfh-9r24-8c9r"
        },
        {
          "name": "https://github.com/assertj/assertj/commit/85ca7eb6609bb179c043b85ae7d290523b1ba79a",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/assertj/assertj/commit/85ca7eb6609bb179c043b85ae7d290523b1ba79a"
        },
        {
          "name": "https://cheatsheetseries.owasp.org/cheatsheets/XML_External_Entity_Prevention_Cheat_Sheet.html",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://cheatsheetseries.owasp.org/cheatsheets/XML_External_Entity_Prevention_Cheat_Sheet.html"
        },
        {
          "name": "https://github.com/assertj/assertj/releases/tag/assertj-build-3.27.7",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/assertj/assertj/releases/tag/assertj-build-3.27.7"
        }
      ],
      "source": {
        "advisory": "GHSA-rqfh-9r24-8c9r",
        "discovery": "UNKNOWN"
      },
      "title": "AssertJ has XML External Entity (XXE) vulnerability when parsing untrusted XML via isXmlEqualTo assertion"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-24400",
    "datePublished": "2026-01-26T22:19:02.161Z",
    "dateReserved": "2026-01-22T18:19:49.172Z",
    "dateUpdated": "2026-01-27T21:36:26.716Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

{
  "affected": [
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c= 3.27.6"
      },
      "package": {
        "ecosystem": "Maven",
        "name": "org.assertj:assertj-core"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "1.4.0"
            },
            {
              "fixed": "3.27.7"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-24400"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-611"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-01-26T21:31:41Z",
    "nvd_published_at": "2026-01-26T23:16:08Z",
    "severity": "HIGH"
  },
  "details": "An XML External Entity (XXE) vulnerability exists in `org.assertj.core.util.xml.XmlStringPrettyFormatter`: the `toXmlDocument(String)` method initializes `DocumentBuilderFactory` with default settings, without disabling DTDs or external entities. This formatter is used by the `isXmlEqualTo(CharSequence)` assertion for `CharSequence` values.\n\nAn application is vulnerable only when it uses untrusted XML input with one of the following methods:\n\n- `isXmlEqualTo(CharSequence)` from `org.assertj.core.api.AbstractCharSequenceAssert`\n- `xmlPrettyFormat(String)` from `org.assertj.core.util.xml.XmlStringPrettyFormatter`\n\n### Impact\n\nIf untrusted XML input is processed by the methods mentioned above (e.g., in test environments handling external fixture files), an attacker could:\n\n- **Read arbitrary local files** via `file://` URIs (e.g., `/etc/passwd`, application configuration files)\n- **Perform Server-Side Request Forgery (SSRF)** via HTTP/HTTPS URIs\n- **Cause Denial of Service** via \"Billion Laughs\" entity expansion attacks\n\n### Mitigation\n\n`isXmlEqualTo(CharSequence)` has been deprecated in favor of [XMLUnit](https://www.xmlunit.org/) in version 3.18.0 and will be removed in version 4.0. Users of affected versions should, in order of preference:\n\n1. Replace `isXmlEqualTo(CharSequence)` with XMLUnit, or\n2. Upgrade to version 3.27.7, or\n3. Avoid using `isXmlEqualTo(CharSequence)` or `XmlStringPrettyFormatter` with untrusted input.\n\n`XmlStringPrettyFormatter` has historically been considered a utility for `isXmlEqualTo(CharSequence)` rather than a feature for AssertJ users, so it is deprecated in version 3.27.7 and removed in version 4.0, with no replacement.\n\n### References\n\n- [CWE-611: Improper Restriction of XML External Entity Reference](https://cwe.mitre.org/data/definitions/611.html)\n- [OWASP XXE Prevention Cheat Sheet](https://cheatsheetseries.owasp.org/cheatsheets/XML_External_Entity_Prevention_Cheat_Sheet.html)",
  "id": "GHSA-rqfh-9r24-8c9r",
  "modified": "2026-01-29T03:24:21Z",
  "published": "2026-01-26T21:31:41Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/assertj/assertj/security/advisories/GHSA-rqfh-9r24-8c9r"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-24400"
    },
    {
      "type": "WEB",
      "url": "https://github.com/assertj/assertj/commit/85ca7eb6609bb179c043b85ae7d290523b1ba79a"
    },
    {
      "type": "WEB",
      "url": "https://cheatsheetseries.owasp.org/cheatsheets/XML_External_Entity_Prevention_Cheat_Sheet.html"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/assertj/assertj"
    },
    {
      "type": "WEB",
      "url": "https://github.com/assertj/assertj/releases/tag/assertj-build-3.27.7"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:L/SC:H/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "AssertJ has XML External Entity (XXE) vulnerability when parsing untrusted XML via isXmlEqualTo assertion"
}