CVE-2026-53573: Geonetwork Core-geonetwork Has An Open Redirect Vulnerability

{
  "schema_version" : "1.4.0",
  "id" : "GHSA-pjp7-q6wp-97qx",
  "modified" : "2026-07-31T22:16:34Z",
  "published" : "2026-07-31T22:16:34Z",
  "aliases" : [ "CVE-2026-53573" ],
  "summary" : "core-geonetwork has an Open Redirect Bypass",
  "details" : "### Summary\nGeoNetwork's post-login redirect handling can be bypassed to redirect users to an attacker-controlled external site, even though the code attempts to restrict redirect targets to relative, in-application URLs. This affects both supported SSO login methods: OAuth2/OIDC and Keycloak.\n\n### Details\nBoth the OAuth2/OIDC and Keycloak login filters validate the client-supplied post-login redirect target before forwarding the browser to it, but the validation does not correctly reject every kind of URL that causes the browser to leave the GeoNetwork origin. As a result, a value that is treated as a safe, in-application relative path by the filter can still cause the browser to be redirected to an external, attacker-controlled host.\n\n### Impact\nAn attacker can craft a link to a legitimate GeoNetwork OAuth2/OIDC or Keycloak login endpoint that, after the login flow completes, redirects the victim to an arbitrary external site. This can be used for phishing (e.g., presenting a fake login form) or to chain into other attacks hosted externally. This does not bypass authentication or expose GeoNetwork data directly; the impact is Open Redirect (CWE-601).\n\nGeoNetwork 3.x and 4.0.x are archived/unmaintained and will not receive a fix for this issue. Instances running those lines should upgrade to a supported release (4.2.16 or later, or 4.4.11 or later).",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:N"
  }, {
    "type" : "CVSS_V4",
    "score" : "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:N/VI:N/VA:N/SC:N/SI:L/SA:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Maven",
      "name" : "org.geonetwork-opensource:geonetwork"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "3.12.0"
      }, {
        "last_affected" : "3.12.12"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "Maven",
      "name" : "org.geonetwork-opensource:geonetwork"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "4.0.0-alpha.1"
      }, {
        "last_affected" : "4.0.6"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "Maven",
      "name" : "org.geonetwork-opensource:geonetwork"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "4.2.0"
      }, {
        "fixed" : "4.2.16"
      } ]
    } ],
    "database_specific" : {
      "last_known_affected_version_range" : "<= 4.2.15"
    }
  }, {
    "package" : {
      "ecosystem" : "Maven",
      "name" : "org.geonetwork-opensource:geonetwork"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "4.4.0"
      }, {
        "fixed" : "4.4.11"
      } ]
    } ],
    "database_specific" : {
      "last_known_affected_version_range" : "<= 4.4.10"
    }
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/geonetwork/core-geonetwork/security/advisories/GHSA-pjp7-q6wp-97qx"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/geonetwork/core-geonetwork/pull/9307"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/geonetwork/core-geonetwork/pull/9309"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/geonetwork/core-geonetwork/commit/0d74f673dfc926bde935819ed34636d789b2fecd"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/geonetwork/core-geonetwork/commit/cde9b6481a29e2473b7b74479b4e3fd6843bac4e"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/geonetwork/core-geonetwork"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/geonetwork/core-geonetwork/releases/tag/4.2.16"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/geonetwork/core-geonetwork/releases/tag/4.4.11"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-601" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-07-31T22:16:34Z",
    "nvd_published_at" : null
  }
}