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

{
  "id": "704016ae31a02ee547764f03cee6acd0ab733f5b2462a8a12a14accd6c126276",
  "url": "https://osv.dev/vulnerability/CLSA-2026-1788816257",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Fix CVE(s): CVE-2026-53786, CVE-2026-53789, CVE-2026-70459, CVE-2026-70463",
    "summary": "* SECURITY UPDATE: \"auth users\" authorization bypass on entries containing a space - debian/patches/CVE-2026-70463.patch: parse the \"auth users\" value with conf_strtok() in auth_server(), so the documented leading-comma form splits on commas alone and an \"@Group Name:deny\" entry is no longer torn in two -- discarding the deny rule and creating an implicit allow rule from its first word; import conf_strtok() into util.c, which this version does not yet carry; document the leading-comma form in rsyncd.conf.yo and in the pre-generated rsyncd.conf.5 (this tree ships no yodl2man, so only the .5 is installed), without which an admin is never told the form that activates the fix; and add testsuite/cve-2026-70463.test - CVE-2026-70463 * SECURITY UPDATE: daemon filter-merge bypass of the module filter list - debian/patches/CVE-2026-53786.patch: in parse_filter_file(), strip the module_dir prefix that parse_merge_name() prepended before checking a client-supplied --filter merge file against daemon_filter_list, so the anchored module-relative daemon rule can match; the strip is conditional on the prefix really being present so the daemon's own \"include from\" / \"exclude from\" and get_cvs_excludes() paths are not truncated; upstream's early return on a daemon-filter hit is deliberately not taken, since without v3.5.0's daemon_config_filter_file exemption it would silently drop the operator's own \"include from\" / \"exclude from\" rules and, without v3.5.0's name+errno suppression, would leav",
    "evidence": "osv:CLSA-2026-1788816257",
    "products": [
      {
        "name": {
          "value": "rsync",
          "evidence": "/affected/0/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "3.1.1-3ubuntu1.3+tuxcare.els11",
            "evidence": "/affected/0/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "CLSA-2026-1788816257",
      "aliases": [
        "CLSA-2026-1788816257"
      ],
      "affected": [
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "3.1.1-3ubuntu1.3+tuxcare.els11"
                }
              ]
            }
          ],
          "package": {
            "name": "rsync",
            "purl": "pkg:deb/tuxcare/rsync?distro=ubuntu-16.04",
            "ecosystem": "TuxCare:Ubuntu:16.04"
          },
          "database_specific": {
            "source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/ubuntu16.04els/CLSA-2026-1788816257.json"
          }
        }
      ],
      "modified": "2026-10-26T09:43:35.249028467Z",
      "provider": "osv",
      "upstream": [
        "CVE-2022-29154",
        "CVE-2026-53786",
        "CVE-2026-53789",
        "CVE-2026-70459",
        "CVE-2026-70463"
      ],
      "references": [
        "https://errata.tuxcare.com/els_os/ubuntu16.04els/CLSA-2026-1788816257.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-2022-29154",
        "evidence": "/upstream"
      },
      {
        "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": 450009,
  "published_at": "2026-09-07T21:24:31+00:00"
}