Rsync versions before 3.4.3 contain an off-by-one out-of-bounds stack write vulnerability in the establishproxyconnection() function in socket.c that allows network attackers to corrupt stack memory by sending a malformed HTTP proxy response. Attackers can exploit this by positioning themselves between the client and proxy or controlling the proxy server to send a response line of 1023 or more bytes without a newline terminator, causing a null byte to be written to an out-of-bounds stack address when the RSYNC_PROXY environment variable is set.
{
"license": "CC-BY-4.0",
"sources": [
{
"url": "https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2026-45232",
"database_specific": {
"status": "Analyzed"
},
"imported": "2026-07-17T22:15:38.164Z",
"modified": "2026-07-14T22:16:53.367Z",
"html_url": "https://nvd.nist.gov/vuln/detail/CVE-2026-45232",
"id": "CVE-2026-45232",
"published": "2026-05-20T02:16:36.887Z"
},
{
"url": "https://euvdservices.enisa.europa.eu/api/enisaid?id=EUVD-2026-31009",
"imported": "2026-07-17T22:15:48.320Z",
"html_url": "https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-31009",
"modified": "2026-07-14T21:32:51Z",
"id": "EUVD-2026-31009",
"published": "2026-05-20T00:45:28Z"
}
]
}