{"id":"CVE-2026-116188","state":"PUBLISHED","title":"rclone serve s3 1.75.0 before 1.75.2 Memory Limit Bypass via Multipart Overflow","description":"rclone serve s3 versions 1.75.0 before 1.75.2 contain an integer overflow vulnerability in multipart reorder-memory accounting that bypasses the configured buffer limit. Attackers can open two concurrent current-part PUT requests declaring huge lengths to wrap the signed int64 counter and retain out-of-order parts in memory, exhausting the host.","publishedAt":"2026-10-25T13:20:24.506Z","updatedAt":"2026-10-25T13:20:24.506Z","severity":{"score":6.9,"label":"Medium","version":"4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N","source":"VulnCheck"},"assigner":"VulnCheck","products":["rclone rclone"],"affected":[{"vendor":"rclone","product":"rclone","packageURL":"pkg:golang/github.com/rclone/rclone","defaultStatus":"unaffected","versions":[{"version":"1.75.0","status":"affected","lessThan":"1.75.2","versionType":"semver"},{"version":"1.75.2","status":"unaffected","versionType":"semver"}]}],"references":["https://github.com/rclone/rclone/security/advisories/GHSA-qjw8-8hmp-c3m6","https://www.vulncheck.com/advisories/rclone-serve-s3-1.75.0-before-1.75.2-memory-limit-bypass-via-multipart-overflow"],"weaknesses":["CWE-190"],"ingestedAt":"2026-10-29T20:10:43.281Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/116xxx/CVE-2026-116188.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-116188","state":"PUBLISHED","datePublished":"2026-10-25T13:20:24.506Z","dateUpdated":"2026-10-25T13:20:24.506Z","assignerShortName":"VulnCheck","assignerOrgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","dateReserved":"2026-10-25T12:26:13.488Z"},"containers":{"cna":{"title":"rclone serve s3 1.75.0 before 1.75.2 Memory Limit Bypass via Multipart Overflow","descriptions":[{"lang":"en","value":"rclone serve s3 versions 1.75.0 before 1.75.2 contain an integer overflow vulnerability in multipart reorder-memory accounting that bypasses the configured buffer limit. Attackers can open two concurrent current-part PUT requests declaring huge lengths to wrap the signed int64 counter and retain out-of-order parts in memory, exhausting the host."}],"affected":[{"vendor":"rclone","product":"rclone","packageURL":"pkg:golang/github.com/rclone/rclone","defaultStatus":"unaffected","versions":[{"version":"1.75.0","status":"affected","lessThan":"1.75.2","versionType":"semver"},{"version":"1.75.2","status":"unaffected","versionType":"semver"}]}],"references":[{"url":"https://github.com/rclone/rclone/security/advisories/GHSA-qjw8-8hmp-c3m6","tags":["vendor-advisory"],"name":"GitHub Security Advisory (GHSA-qjw8-8hmp-c3m6)"},{"url":"https://www.vulncheck.com/advisories/rclone-serve-s3-1.75.0-before-1.75.2-memory-limit-bypass-via-multipart-overflow","name":"VulnCheck Advisory: rclone serve s3 1.75.0 before 1.75.2 Memory Limit Bypass via Multipart Overflow","tags":["third-party-advisory"]}],"metrics":[{"format":"CVSS","cvssV4_0":{"version":"4.0","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N","attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"NONE","privilegesRequired":"NONE","userInteraction":"NONE","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"NONE","vulnAvailabilityImpact":"LOW","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","subAvailabilityImpact":"NONE","baseScore":6.9,"baseSeverity":"MEDIUM"}},{"format":"CVSS","cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"LOW","baseScore":5.3,"baseSeverity":"MEDIUM"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-190","lang":"en","description":"Integer Overflow or Wraparound","type":"CWE"}]}],"providerMetadata":{"shortName":"VulnCheck","orgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","dateUpdated":"2026-10-25T13:20:24.506Z"},"datePublic":"2026-10-09T00:00:00.000Z","cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:rclone:rclone:*:*:*:*:*:*:*:*","versionStartIncluding":"1.75.0","versionEndExcluding":"1.75.2"}]}]}],"credits":[{"lang":"en","value":"Kushalkhemka","type":"finder"},{"lang":"en","value":"ncw","type":"finder"},{"lang":"en","value":"mayank-jangid-moon","type":"finder"},{"lang":"en","value":"skigeek16","type":"finder"},{"lang":"en","value":"opensec-intelligence","type":"finder"}],"x_generator":{"engine":"vulncheck-endgame"}}}}}