{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "cpe": "cpe:2.3:a:samba:rsync:*:*:*:*:*:*:*:*",
            "extracted_events": [
              {
                "introduced": "0"
              },
              {
                "last_affected": "3.4.2"
              }
            ],
            "source": "CPE_RANGE"
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "last_affected": "de3cc03b03be153092f266aa1117b4706947ed07"
            }
          ],
          "repo": "https://git.samba.org/rsync.git/",
          "type": "GIT"
        },
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "0"
              },
              {
                "fixed": "3.4.3"
              }
            ],
            "source": [
              "AFFECTED_FIELD",
              "REFERENCES"
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2c7777aaa62abeb1bca192da345e6e8c685e872a"
            }
          ],
          "repo": "https://github.com/rsyncproject/rsync",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-28pw-r563-rxvm"
  ],
  "database_specific": {
    "cna_assigner": "VulnCheck",
    "cwe_ids": [
      "CWE-125"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/43xxx/CVE-2026-43620.json"
  },
  "details": "Rsync version 3.4.2 and prior contain a receiver-side out-of-bounds array read vulnerability in recv_files() in receiver.c that allows a malicious rsync server to crash the rsync client process. Attackers can exploit the vulnerability by setting CF_INC_RECURSE in compatibility flags and sending a specially crafted file list where the first sorted entry is not the leading dot directory, followed by a transfer record with ndx=0 and an iflag word without ITEM_TRANSFER, causing the receiver to read 8 bytes before the allocated pointer array and dereference an invalid pointer at an unmapped address, resulting in a deterministic SIGSEGV crash of the rsync client.",
  "id": "CVE-2026-43620",
  "modified": "2026-07-08T05:37:11.928139830Z",
  "published": "2026-05-20T00:47:57.086Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/43xxx/CVE-2026-43620.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/RsyncProject/rsync/releases/tag/v3.4.3"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/RsyncProject/rsync/security/advisories/GHSA-28pw-r563-rxvm"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-43620"
    },
    {
      "type": "ADVISORY",
      "url": "https://www.vulncheck.com/advisories/rsync-out-of-bounds-array-read-via-recv-files"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/RsyncProject/rsync"
    }
  ],
  "schema_version": "1.7.5",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "Rsync \u003c 3.4.3 Out-of-Bounds Array Read via recv_files()"
}