# CVE-2026-116188: rclone: rclone serve s3 versions 1.75.0 before 1.75.2 contain an integer overflow vulnerability in multipart reorder-memory a...

CVE-2026-116188 is fixed in 3 products on 1 platform, first by ALAS2023-2026-3401, released November 10, 2026. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2026-116188
- Priority: High
- CVSS: n/a (important)
- EPSS: 0.0025
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Nov 9, 2026

## 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.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | rclone amzn 2023 | 1.75.2-1.amzn2023 | [ALAS2023-2026-3401](https://patchblox.com/security/data/fix/linux/alas2023-2026-3401.md) | Nov 10, 2026 |
| Linux | rclone-debuginfo amzn 2023 | 1.75.2-1.amzn2023 | [ALAS2023-2026-3401](https://patchblox.com/security/data/fix/linux/alas2023-2026-3401.md) | Nov 10, 2026 |
| Linux | rclone-debugsource amzn 2023 | 1.75.2-1.amzn2023 | [ALAS2023-2026-3401](https://patchblox.com/security/data/fix/linux/alas2023-2026-3401.md) | Nov 10, 2026 |

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Data as of 2026-11-11T13:47:35Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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