Fix CVE(s): CVE-2026-53786, CVE-2026-53789, CVE-2026-70459, CVE-2026-70463

{
  "id": "7c00a27fc73ebb756bc9500c3a7db76994106e67d41778ea2108a6cf7a7373a4",
  "url": "https://osv.dev/vulnerability/CLSA-2026-1788815738",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Fix CVE(s): CVE-2026-53786, CVE-2026-53789, CVE-2026-70459, CVE-2026-70463",
    "summary": "* SECURITY UPDATE: authorization bypass in \"auth users\" @Group Name parsing - debian/patches/CVE-2026-70463.patch: tokenise the \"auth users\" value with conf_strtok() in authenticate.c, imported into util.c and declared in proto.h, so a leading comma splits on commas alone and an @Group Name entry containing a space is no longer torn in two and its deny rule silently discarded - CVE-2026-70463 * SECURITY UPDATE: daemon filter-merge bypass of the module filter list - debian/patches/CVE-2026-53786.patch: strip module_dirlen from an absolute --filter merge path in parse_filter_file() in exclude.c before checking it against daemon_filter_list, so an anchored module-relative daemon rule matches, and treat a merge file hidden by the daemon filter as non-existent instead of a fatal error - CVE-2026-53786 * SECURITY UPDATE: daemon NULL dereference on a non-directory transfer root - debian/patches/CVE-2026-70459.patch: reject a \".\" or \"/.\" transfer-root entry that is not a directory in recv_file_entry() in flist.c, instead of dereferencing it as a directory structure pointer, and require dir_flist to actually hold an entry in recv_file_list() before trusting parent_ndx 0, closing the second route to the same uninitialised dir_flist->files[0] - CVE-2026-70459 * SECURITY UPDATE: --delete scope widening via implied-parent reclassification - debian/patches/CVE-2026-53789.patch: add is_implied_parent_dir() to exclude.c and use it in recv_file_entry() in flist.c to force an implied parent di",
    "evidence": "osv:CLSA-2026-1788815738",
    "products": [
      {
        "name": {
          "value": "rsync",
          "evidence": "/affected/0/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "3.1.2-2.1ubuntu1.6+tuxcare.els9",
            "evidence": "/affected/0/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "CLSA-2026-1788815738",
      "aliases": [
        "CLSA-2026-1788815738"
      ],
      "affected": [
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "3.1.2-2.1ubuntu1.6+tuxcare.els9"
                }
              ]
            }
          ],
          "package": {
            "name": "rsync",
            "purl": "pkg:deb/tuxcare/rsync?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-2026-1788815738.json"
          }
        }
      ],
      "modified": "2026-10-26T09:32:04.179882146Z",
      "provider": "osv",
      "upstream": [
        "CVE-2026-53786",
        "CVE-2026-53789",
        "CVE-2026-70459",
        "CVE-2026-70463"
      ],
      "references": [
        "https://errata.tuxcare.com/els_os/ubuntu18.04els/CLSA-2026-1788815738.html",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-53786",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-53789",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-70459",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-70463"
      ]
    },
    "related_cves": [
      {
        "value": "CVE-2026-53786",
        "evidence": "/upstream"
      },
      {
        "value": "CVE-2026-53789",
        "evidence": "/upstream"
      },
      {
        "value": "CVE-2026-70459",
        "evidence": "/upstream"
      },
      {
        "value": "CVE-2026-70463",
        "evidence": "/upstream"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 449576,
  "published_at": "2026-09-07T22:37:24+00:00"
}