{"apiVersion":"1.0","identifier":"CVE-2026-53791","description":"rsync daemon before 3.5.0 contains an IP address spoofing vulnerability that allows unauthenticated remote attackers to bypass IP-based access controls by sending a crafted PROXY protocol header with a forged source address. Attackers who can connect directly to the rsync daemon can inject a spoofed source IP in the PROXY protocol header to circumvent hosts allow/deny rules, gaining unauthorized access that would otherwise be blocked based on their real source address.","publishedAt":"2026-08-13T15:19:43","lastModifiedAt":"2026-08-26T17:01:33","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-53791","cvssScore":9.1,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","epssProbability":0.00471,"riskScore":0.95,"affectedProduct":"rsync","affectedVersions":"<3.5.0","vulnerabilityType":"Library","operatingSystems":[],"links":{"self":"https://www.redsauce.net/api/cves/CVE-2026-53791","webPages":{"es":"https://www.redsauce.net/es/cves/CVE-2026-53791","en":"https://www.redsauce.net/en/cves/CVE-2026-53791","fr":"https://www.redsauce.net/fr/cves/CVE-2026-53791","pt":"https://www.redsauce.net/pt/cves/CVE-2026-53791","de":"https://www.redsauce.net/de/cves/CVE-2026-53791","sk":"https://www.redsauce.net/sk/cves/CVE-2026-53791","el":"https://www.redsauce.net/el/cves/CVE-2026-53791"},"source":"https://nvd.nist.gov/vuln/detail/CVE-2026-53791"}}