{"id":"CVE-2026-116188","title":"rclone serve s3 1.75.0 before 1.75.2 Memory Limit Bypass via Multipart Overflow","summary":"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 declari…","severity":"medium","cvss":5.3,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","cvssSource":"cna","cwe":["CWE-190"],"vendor":"rclone","product":"rclone","affected":["rclone >= 1.75.0 < 1.75.2"],"published":"2026-10-25","updated":"2026-10-25","sourceUpdated":"2026-10-25T13:20:24.506Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-116188","references":[{"url":"https://github.com/rclone/rclone/security/advisories/GHSA-qjw8-8hmp-c3m6","label":"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","label":"VulnCheck Advisory: rclone serve s3 1.75.0 before 1.75.2 Memory Limit Bypass via Multipart Overflow"}],"tags":["cve.org"],"ingestedAt":"2026-10-25T22:08:29.943Z","slug":"CVE-2026-116188","body":"## Overview\n\nrclone 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.\n\n## Affected\n\n- `rclone >= 1.75.0 < 1.75.2`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":29,"depthScoreParts":{"impact":29.2,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}