{
  "affected": [
    {
      "package": {
        "ecosystem": "Go",
        "name": "github.com/doyensec/safeurl"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0.2.4"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-54452"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-918"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-07-15T21:58:03Z",
    "nvd_published_at": null,
    "severity": "MODERATE"
  },
  "details": "The `privateNetworks` blocklist was found to be missing newly added CIDR ranges. More specifically, the following CIDR ranges were not being blocked:\n- `64:ff9b:1::/48`: NAT64 local-use prefix (RFC 8215)\n- `5f00::/16`: Segment Routing (SRv6) SIDs (RFC 9602)\n- `3fff::/20`: documentation prefix (RFC 9637)\n- `100:0:0:1::/64`: Dummy IPv6 Prefix (RFC 9780)\n\n### Impact\nIf exploited, an attacker would potentially be able to reach resources hosted on the IPs residing in the missing ranges.\n\n### Workarounds\nDisable IPv6 by setting `EnableIPv6(false)`. This is the default behavior of the library.\n\n### Resolution\nUpgrade to v0.2.4\n\n### Credits\nsafeurl thanks @tonghuaroot for reporting.",
  "id": "GHSA-xgch-x3mx-cm3c",
  "modified": "2026-07-15T21:58:03Z",
  "published": "2026-07-15T21:58:03Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/doyensec/safeurl/security/advisories/GHSA-xgch-x3mx-cm3c"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/doyensec/safeurl"
    },
    {
      "type": "WEB",
      "url": "https://github.com/doyensec/safeurl/releases/tag/v0.2.4"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "safeurl is Missing IPv6 CIDR Ranges in Blocklist"
}