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Medium, CVSS 5.3amended

rclone: source object names can escape the configured root on upload

CVE-2026-88046GHSA-38xv-hf3p-h7mq

What to do

Vendor fix available. Upgrade each affected package to the fixed version on its release line (github.com/rclone/rclone 1.75.1), redeploy, then verify what is actually installed.

This page has no inventory attached, so it cannot say whether you are affected. A vendor fix is not proof that your deployment is fixed.

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Affected packages

Sources

Severity and exploitation
Exploitation
No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.
CVSS
5.3 · CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:N
EPSS
  • CVE-2026-88046: 0.29% estimated exploitation activity in the next 30 days; percentile 22.13 (FIRST EPSS, 2026-11-03). This is a model estimate, not proof of exploitation or customer exposure.
Source description

As published by the source; long descriptions are shortened.

Summary Multiple backends, when given a specially crafted object to copy, can escape the backend confinement. | Backend | Keep/Close | Per-backend severity | |---|---|---| | sftp | Medium | Real filesystem escape, fires under default encoding. | | smb | Low-Medium | Escapes to a different SMB share the credential can reach. | | ftp | Low | Real, leading-.. overshoot PoC is partly neutralized by encoding; escape bounded to at/below the login base. | | webdav | Low | Server-side ACLs are the real boundary. | | b2 | Low | Same-account sibling bucket crossing on a flat keyspace. | | swift | Low | Same, container. | | qingstor | Low | Same. | | oracleobjectstorage | Low | Same. | | internetarchive | Low | IA items are owner-writable only; confined to user's own items. | | storj | Low | Can retarget a different bucket in the same access grant. | | filelu | Low | Confined to the user's own account. | | shade | Low | Confined to the user's own drive. | | sia | Low | siad API password already…

Dates and revisions
Published by the source
Last modified by the source
Source last checked
  1. Revision 3 · amended ·

    Amended from ghsa record GHSA-38xv-hf3p-h7mq

  2. Revision 2 · amended ·

    Amended from osv record GO-2026-6457

  3. Revision 1 · created ·

    Published from osv record GHSA-38xv-hf3p-h7mq

Agent brief

Preview the exact text before you copy it. Commands are read-only suggestions; review them before running anything.

# Patch Next advisory brief: CVE-2026-88046

Advisory: rclone: source object names can escape the configured root on upload
IDs: CVE-2026-88046, GHSA-38xv-hf3p-h7mq
Record: https://patchnext.com/advisories/cve-2026-88046 (revision 3, source checked 26 Oct 2026, 15:29 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: Medium (CVSS 5.3)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor fix available; fixed versions by package: github.com/rclone/rclone 1.75.1. A vendor fix does not mean a deployment is fixed.

## Affected components
- Go github.com/rclone/rclone: affected < 1.75.1; fixed in 1.75.1

## Suggested inspection (read-only)
- Go github.com/rclone/rclone: check the installed version with your package manager.

## Supported action
Upgrade each affected component to a fixed version on its release line. For a transitive dependency, upgrade the parent package or add an override or constraint, then regenerate the lockfile. Redeploy every environment that ran an affected version.

## Required regression checks
- Run the test suite and a production build.
- Exercise the features that depend on github.com/rclone/rclone.
- Repeat the inspection and confirm that only fixed versions remain installed.

## Rollback considerations
- Keep the previous lockfile and deployment artifact. Rolling back reinstates the vulnerable version, so apply any documented mitigation while you fix forward.

## Unresolved questions
- Which deployments run an affected version?
- Exploitation status can change. Check again before lowering the priority.
- Mark the work resolved only after the fixed version is verified in production.

## Sources
- Verified: https://osv.dev/vulnerability/GHSA-38xv-hf3p-h7mq (OSV record GHSA-38xv-hf3p-h7mq lists affected ranges: Go github.com/rclone/rclone >=0 <1.75.1 (fixed))
- Verified: https://osv.dev/vulnerability/GO-2026-6457 (OSV record GO-2026-6457 lists affected ranges: Go github.com/rclone/rclone >=0 <1.75.1 (fixed))
- Verified: https://github.com/advisories/GHSA-38xv-hf3p-h7mq (GitHub-reviewed advisory GHSA-38xv-hf3p-h7mq lists affected ranges: Go github.com/rclone/rclone >=0 <1.75.1)

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