Fix CVE(s): CVE-2026-87766

{
  "id": "ad30e0f285b6ef2308460c5f2d5add2be53350f2ddca738408015c5755f1d718",
  "url": "https://osv.dev/vulnerability/CLSA-2026-1791475845",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Fix CVE(s): CVE-2026-87766",
    "summary": "* SECURITY UPDATE: symlink traversal during sandbox setup lets a crafted source tree redirect file/dir creation and mounts outside the sandbox (sandbox escape) - debian/patches/CVE-2026-87766.patch: resolve every destination inside /newroot and every source inside /oldroot a component at a time (safe_openat in utils.c), create and mount through O_PATH|O_NOFOLLOW fds passed to the privileged helper (bind_mount_fd), and refuse to mount on a symlink destination (bubblewrap.c, bind-mount.c, utils.c) - CVE-2026-87766",
    "evidence": "osv:CLSA-2026-1791475845",
    "products": [
      {
        "name": {
          "value": "bubblewrap",
          "evidence": "/affected/0/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "0.2.1-1ubuntu0.1+tuxcare.els2",
            "evidence": "/affected/0/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "CLSA-2026-1791475845",
      "aliases": [
        "CLSA-2026-1791475845"
      ],
      "affected": [
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "0.2.1-1ubuntu0.1+tuxcare.els2"
                }
              ]
            }
          ],
          "package": {
            "name": "bubblewrap",
            "purl": "pkg:deb/tuxcare/bubblewrap?distro=ubuntu-18.04",
            "ecosystem": "TuxCare:Ubuntu:18.04"
          },
          "database_specific": {
            "source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/ubuntu18.04els/CLSA-2026-1791475845.json"
          }
        }
      ],
      "modified": "2026-10-26T09:32:04.621085387Z",
      "provider": "osv",
      "upstream": [
        "CVE-2026-87766"
      ],
      "references": [
        "https://errata.tuxcare.com/els_os/ubuntu18.04els/CLSA-2026-1791475845.html",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-87766"
      ]
    },
    "related_cves": [
      {
        "value": "CVE-2026-87766",
        "evidence": "/upstream"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 449624,
  "published_at": "2026-10-08T23:16:00+00:00"
}