CVE-2026-116188

rclone serve s3 1.75.0 before 1.75.2 Memory Limit Bypass via Multipart Overflow

MEDIUM
5.3
CVSS Score
Published: October 25, 2026 at 01:20 PM UTC
Updated: October 28, 2026 at 03:39 PM UTC
1 product affected across 1 vendorRclone

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Severity
MEDIUM5.3
Exploit prediction
EPSS 0.3%

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

1.75.0 ≤ v < 1.75.2
Vendor states this is fixed in 1.75.2 (unaffected)

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

CVSS

5.3MEDIUMVulnCheck
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
LOW
Vector?

Quick Info

StatusANALYZED
CWE
CWE-190

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