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.

CVSS v3 5.3 MEDIUM

5.3^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 3.9 / Impact : 1.4

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact LOW

Scope UNCHANGED

References

Link	Resource
https://github.com/rclone/rclone/security/advisories/GHSA-qjw8-8hmp-c3m6	Vendor Advisory
https://www.vulncheck.com/advisories/rclone-serve-s3-1.75.0-before-1.75.2-memory-limit-bypass-via-multipart-overflow	Third Party Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:rclone:rclone:*:*:*:*:*:*:*:*

History

28 Oct 2026, 15:39

Type	Values Removed	Values Added
First Time		Rclone Rclone rclone
References	~~() https://github.com/rclone/rclone/security/advisories/GHSA-qjw8-8hmp-c3m6 -~~	() https://github.com/rclone/rclone/security/advisories/GHSA-qjw8-8hmp-c3m6 - Vendor Advisory
References	~~() https://www.vulncheck.com/advisories/rclone-serve-s3-1.75.0-before-1.75.2-memory-limit-bypass-via-multipart-overflow -~~	() https://www.vulncheck.com/advisories/rclone-serve-s3-1.75.0-before-1.75.2-memory-limit-bypass-via-multipart-overflow - Third Party Advisory
CPE		cpe:2.3:a:rclone:rclone::::::::

25 Oct 2026, 14:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-10-25 14:16

Updated : 2026-10-28 15:39

NVD link : CVE-2026-116188

Mitre link : CVE-2026-116188

CVE.ORG link : CVE-2026-116188

JSON object : View

Products Affected

rclone

rclone

CWE

CWE-190

Integer Overflow or Wraparound

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