{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-70453","assignerOrgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","state":"PUBLISHED","assignerShortName":"VulnCheck","dateReserved":"2026-08-04T14:52:23.814Z","datePublished":"2026-08-13T14:46:20.696Z","dateUpdated":"2026-08-14T16:51:19.016Z"},"containers":{"cna":{"providerMetadata":{"orgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","shortName":"VulnCheck","dateUpdated":"2026-08-14T16:51:19.016Z"},"title":"rsync < 3.5.0 Algorithmic Complexity DoS via hash_search()","datePublic":"2026-08-12T00:00:00.000Z","problemTypes":[{"descriptions":[{"lang":"en","cweId":"CWE-407","description":"CWE-407 Inefficient Algorithmic Complexity","type":"CWE"}]}],"affected":[{"vendor":"RsyncProject","product":"rsync","repo":"https://github.com/RsyncProject/rsync","versions":[{"status":"affected","version":"0","lessThanOrEqual":"3.4.4","versionType":"semver"},{"status":"unaffected","version":"3.5.0","versionType":"semver"}],"defaultStatus":"unaffected","packageURL":"pkg:github/RsyncProject/rsync"}],"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:samba:rsync:*:*:*:*:*:*:*:*","versionEndIncluding":"3.4.4"}]}]}],"descriptions":[{"lang":"en","value":"rsync before 3.5.0 contains an algorithmic complexity vulnerability in the hash_search() function that allows a remote attacker to cause a denial of service by delivering a carefully constructed file list. A sender can exploit the quadratic-time worst-case behavior in hash lookups to exhaust receiver CPU resources with a modest number of crafted entries, causing a sustained denial of service.","supportingMedia":[{"type":"text/html","base64":false,"value":"<p>rsync before 3.5.0&nbsp;contains an algorithmic complexity vulnerability in the hash_search() function that allows a remote attacker to cause a denial of service by delivering a carefully constructed file list. A sender can exploit the quadratic-time worst-case behavior in hash lookups to exhaust receiver CPU resources with a modest number of crafted entries, causing a sustained denial of service.</p>"}]}],"references":[{"url":"https://github.com/RsyncProject/rsync/security/advisories/GHSA-8x5r-mjx8-83hv","name":"GitHub Security Advisory (GHSA-8x5r-mjx8-83hv)","tags":["vendor-advisory"]},{"url":"https://github.com/RsyncProject/rsync/releases/tag/v3.5.0","name":"rsync 3.5.0 Release Notes","tags":["release-notes"]},{"url":"https://www.vulncheck.com/advisories/rsync-algorithmic-complexity-dos-via-hash-search","tags":["third-party-advisory"]}],"metrics":[{"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}],"cvssV4_0":{"attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"NONE","privilegesRequired":"NONE","userInteraction":"NONE","vulnConfidentialityImpact":"NONE","subConfidentialityImpact":"NONE","vulnIntegrityImpact":"NONE","subIntegrityImpact":"NONE","vulnAvailabilityImpact":"HIGH","subAvailabilityImpact":"NONE","exploitMaturity":"NOT_DEFINED","Safety":"NOT_DEFINED","Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","valueDensity":"NOT_DEFINED","vulnerabilityResponseEffort":"NOT_DEFINED","providerUrgency":"NOT_DEFINED","version":"4.0","baseSeverity":"HIGH","baseScore":8.7,"vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N"}},{"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}],"cvssV3_1":{"version":"3.1","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"HIGH","baseSeverity":"HIGH","baseScore":7.5,"vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"}}],"credits":[{"lang":"en","value":"heyciao","type":"finder"},{"lang":"en","value":"dr-who","type":"remediation developer"}],"source":{"discovery":"EXTERNAL"},"x_generator":{"engine":"Vulnogram 1.0.4"}},"adp":[{"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-08-13T17:30:31.519960Z","id":"CVE-2026-70453","options":[{"Exploitation":"none"},{"Automatable":"yes"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-08-13T17:32:14.803Z"}}]}}