CVE-2026-116188

Medium

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.

SeverityMedium

CVSS5.3

Exploit probability—

ProductRclone

PublishedOct 25, 2026

First seenOct 25, 2026

Weakness typeCWE-190Integer overflow

How to fix

Update

rclone rclone1.75.2 or later

Vendor advisories

github.com/rclone/rclone/security/advisories/GHSA-qjw8-8hmp-c3m6

Affected products

Product	Affected versions	Fixed in
rclone rclone	1.75.0 ≤ v < 1.75.2	1.75.2

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