Rsync < 3.4.3 Off-by-One Stack Write via HTTP Proxy_CVE-2026-45232

{
    "lastseen": "",
    "description": "Rsync versions before 3.4.3 contain an off-by-one out-of-bounds stack write vulnerability in the establish_proxy_connection() 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.",
    "published": "2026-05-20T00:45:28.540Z",
    "modified": "2026-05-20T00:45:28.540Z",
    "type": "cve",
    "title": "Rsync < 3.4.3 Off-by-One Stack Write via HTTP Proxy",
    "source": "VulnCheck",
    "references": "https://github.com/RsyncProject/rsync/security/advisories/GHSA-8f85-j2cv-59m8\nhttps://github.com/RsyncProject/rsync/releases/tag/v3.4.3\nhttps://www.vulncheck.com/advisories/rsync-off-by-one-stack-write-via-http-proxy",
    "id": "CVE-2026-45232",
    "bulletinFamily": "",
    "cwe": [
        "CWE-193"
    ],
    "cvelist": null,
    "sourceData": "RsyncProject rsync 0",
    "sourceHref": "",
    "cvss": {
        "score": 2.1,
        "severity": "LOW",
        "vector": "CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:A/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N",
        "version": "4.0"
    },
    "cvss2": [],
    "cvss3": {
        "version": "",
        "vectorString": "",
        "baseScore": 0,
        "baseSeverity": "",
        "attackVector": "",
        "attackComplexity": "",
        "privilegesRequired": "",
        "userInteraction": "",
        "scope": "",
        "confidentialityImpact": "",
        "integrityImpact": "",
        "availabilityImpact": "",
        "cvssV3": {
            "version": "",
            "vectorString": "",
            "baseScore": 0,
            "baseSeverity": "",
            "attackVector": "",
            "attackComplexity": "",
            "privilegesRequired": "",
            "userInteraction": "",
            "scope": "",
            "confidentialityImpact": "",
            "integrityImpact": "",
            "availabilityImpact": ""
        }
    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "rsync",
    "version": "0",
    "vendor": "RsyncProject",
    "ai_description": "",
    "ai_severity": "",
    "ai_vendor": "",
    "ai_product": "",
    "ai_version": "",
    "ai_score": 0
}