CVE-2026-116188

MEDIUM 5.3

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

CVSS Score

5.3

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-190
Vendor	rclone
Product	rclone
Published	Oct 25, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

Low

Affected Versions

rclone / rclone

1.75.0 < 1.75.2

References

NVD ↗ CVE.org ↗ EPSS Data ↗

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

Credits

Kushalkhemka ncw mayank-jangid-moon skigeek16 opensec-intelligence