{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "0"
              },
              {
                "fixed": "2.6.1"
              }
            ],
            "source": [
              "AFFECTED_FIELD",
              "REFERENCES"
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "7a9f4b0b9558821b0422152ebe21ae56930fe764"
            },
            {
              "fixed": "47b7c804cb38a4af659ec735e473d3854c63a3c0"
            }
          ],
          "repo": "https://github.com/oras-project/oras-go",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-xf85-363p-868w"
  ],
  "database_specific": {
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
      "CWE-319",
      "CWE-918"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/48xxx/CVE-2026-48978.json"
  },
  "details": "oras-go is a Go library for managing OCI artifacts. Prior to 2.6.1, auth.Client follows the realm URL from a registry's WWW-Authenticate: Bearer challenge without validating the scheme or host, allowing a malicious or compromised registry to cause SSRF to internal networks such as http://169.254.169.254/, http://10.0.0.x/, and http://127.0.0.1/, or to downgrade a registry contacted over https:// to an http:// token endpoint in registry/remote/auth/client.go through Client.Do(), Client.fetchBearerToken(), fetchDistributionToken, and fetchOAuth2Token. This issue is fixed in version 2.6.1.",
  "id": "CVE-2026-48978",
  "modified": "2026-07-25T03:56:18.103249425Z",
  "published": "2026-07-17T19:34:53.690Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/oras-project/oras-go/releases/tag/v2.6.1"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/48xxx/CVE-2026-48978.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/oras-project/oras-go/security/advisories/GHSA-xf85-363p-868w"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-48978"
    },
    {
      "type": "FIX",
      "url": "https://github.com/oras-project/oras-go/commit/7a9f4b0b9558821b0422152ebe21ae56930fe764"
    }
  ],
  "schema_version": "1.8.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:A/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "oras-go: Malicious registry can hijack Bearer token realm to exfiltrate credentials and refresh tokens"
}