golang-oras-oras-go — security advisory

{
  "id": "34b21721104fcab55d603a21963b24109145f1d0dcb05ccc03d3bdf77c125d95",
  "url": "https://osv.dev/vulnerability/DEBIAN-CVE-2026-50163",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "DEBIAN-CVE-2026-50163",
    "summary": "oras-go is a Go library for managing OCI artifacts. Prior to 2.6.2, ensureLinkPath in content/file/utils.go:262-275 validates a hardlink target relative to the extract base but returns the unresolved target, causing os.Link(\"victim.secret\", \"/payload.tar.gz/evil_cwd_link\") to resolve header.Linkname against the process current working directory for a Typeflag=TypeLink entry such as Name=payload.tar.gz/evil_cwd_link and Linkname=\"victim.secret\" with io.deis.oras.content.unpack: \"true\", which can expose or tamper with files such as .env, .git/config, .aws/credentials, and ~/.ssh/config. This issue is fixed in version 2.6.2.",
    "evidence": "osv:DEBIAN-CVE-2026-50163",
    "products": [
      {
        "name": {
          "value": "golang-oras-oras-go",
          "evidence": "/affected/0/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": [
          {
            "value": "1.1.1-1",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "2.5.0-1",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "2.6.0-1",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "2.6.2-1",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "2.6.2-2",
            "evidence": "/affected/0/versions"
          }
        ]
      },
      {
        "name": {
          "value": "golang-oras-oras-go",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": [
          {
            "value": "2.5.0-1",
            "evidence": "/affected/1/versions"
          },
          {
            "value": "2.6.0-1",
            "evidence": "/affected/1/versions"
          },
          {
            "value": "2.6.2-1",
            "evidence": "/affected/1/versions"
          },
          {
            "value": "2.6.2-2",
            "evidence": "/affected/1/versions"
          }
        ]
      },
      {
        "name": {
          "value": "golang-oras-oras-go",
          "evidence": "/affected/2/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "2.6.2-1",
            "evidence": "/affected/2/ranges"
          }
        ],
        "affected_versions": [
          {
            "value": "2.5.0-1",
            "evidence": "/affected/2/versions"
          },
          {
            "value": "2.6.0-1",
            "evidence": "/affected/2/versions"
          }
        ]
      }
    ],
    "severity": "high",
    "structured": {
      "id": "DEBIAN-CVE-2026-50163",
      "aliases": [
        "DEBIAN-CVE-2026-50163"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                }
              ]
            }
          ],
          "package": {
            "name": "golang-oras-oras-go",
            "purl": "pkg:deb/debian/golang-oras-oras-go?arch=source&distro=bookworm",
            "ecosystem": "Debian:12"
          },
          "versions": [
            "1.1.1-1",
            "2.5.0-1",
            "2.6.0-1",
            "2.6.2-1",
            "2.6.2-2"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-50163.json"
          },
          "ecosystem_specific": {
            "urgency": "not yet assigned"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                }
              ]
            }
          ],
          "package": {
            "name": "golang-oras-oras-go",
            "purl": "pkg:deb/debian/golang-oras-oras-go?arch=source&distro=trixie",
            "ecosystem": "Debian:13"
          },
          "versions": [
            "2.5.0-1",
            "2.6.0-1",
            "2.6.2-1",
            "2.6.2-2"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-50163.json"
          },
          "ecosystem_specific": {
            "urgency": "not yet assigned"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "2.6.2-1"
                }
              ]
            }
          ],
          "package": {
            "name": "golang-oras-oras-go",
            "purl": "pkg:deb/debian/golang-oras-oras-go?arch=source&distro=forky",
            "ecosystem": "Debian:14"
          },
          "versions": [
            "2.5.0-1",
            "2.6.0-1"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-50163.json"
          },
          "ecosystem_specific": {
            "urgency": "not yet assigned"
          }
        }
      ],
      "modified": "2026-10-25T09:47:38.018228110Z",
      "provider": "osv",
      "upstream": [
        "CVE-2026-50163"
      ],
      "references": [
        "https://security-tracker.debian.org/tracker/CVE-2026-50163"
      ]
    },
    "related_cves": [
      {
        "value": "CVE-2026-50163",
        "evidence": "/upstream"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 445140,
  "published_at": "2026-07-17T20:17:23.943+00:00"
}