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    CVE-2026-116188

    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.

    Published:Oct 25, 2026
    Last Modified:Nov 4, 2026
    EPS:Oct 25, 2026
    EPSS Score:0.00253
    CVSS Score:5.3

    Affected Products

    Vendor
    Rclone
    Product
    Rclone

    Exploits

    No exploit reference

    Common Weakness Enumeration

    CWE-190 Integer Overflow or Wraparound

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-92 Forced Integer Overflow

    Related CVEs

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    CVE-2026-116196 (CVSS 6) — Rclone before v1.75.2 contains a credential exposure vulnerability in the b2 backend that leaks the live accou…
    CVE-2026-116194 (CVSS 7.6) — Rclone from 1.52.0 before 1.75.2 contains a cross-site request forgery vulnerability in the pCloud backend's l…
    CVE-2026-116193 (CVSS 6.9) — Rclone from 1.64.0 before 1.75.2 contains an authentication bypass vulnerability in serve webdav that lets una…
    CVE-2026-116192 (CVSS 8.2) — rclone from 1.37 before 1.74.2 contains a server-side request forgery vulnerability that allows unauthenticate…
    CVE-2026-116191 (CVSS 8.7) — Rclone before 1.75.2 contains a path traversal vulnerability in serve webdav that allows unauthenticated attac…
    CVE-2026-116189 (CVSS 7.7) — rclone from 1.55.0 before 1.75.2 contains a signature verification bypass in stable selfupdate that trusts che…
    CVE-2026-116190 (CVSS 6.3) — rclone from v1.56.0 before v1.75.2 contains an information disclosure vulnerability in the WebDAV backend that…
    CVE-2026-116187 (CVSS 6.1) — Rclone from v1.68.0 before v1.75.2 contains an authorization bypass vulnerability in serve s3 --auth-proxy tha…
    CVE-2026-93987 (CVSS 4.6) — rclone versions 1.56.0 through 1.75.0 contain a path traversal vulnerability in the `rclone serve docker` volu…

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High