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v1.20.18

parruda/swarmv1.20.18Jul 9, 2026by 9001

AI Summary

Default-disabled the bwrap ffmpeg sandbox to address compatibility issues with various Linux filesystem layouts, while introducing a new shadowing feature to fully unmap volumes.

Key Highlights

  • Default-disabled bwrap ffmpeg sandbox to prevent autoconfiguration failures
  • New shadowing feature allows fully unmapping volumes using `//NULL` path
  • Fixed false-positive warnings on startup

New Features

  • Shadowing via `//NULL` filesystem path
  • Always rotate logfiles on startup unless `--rlo no` is set
  • Optimized thumbnail I/O by skipping expiration checks when disabled

Full Release Notes

<img src="https://github.com/9001/copyparty/raw/hovudstraum/docs/logo.svg" width="250" align="right"/>

* read-only demo server at https://a.ocv.me/pub/demo/
* [docker image](https://github.com/9001/copyparty/tree/hovudstraum/scripts/docker) β•± [similar software](https://github.com/9001/copyparty/blob/hovudstraum/docs/versus.md) β•± [client testbed](https://cd.ocv.me/b/)

there is a [discord server](https://discord.gg/25J8CdTT6G) with an `@everyone` in case of future important updates, such as [vulnerabilities](https://github.com/9001/copyparty/security) (most recently 2026-07-06)

## recent important news

* [v1.20.17 (2026-07-06)](https://github.com/9001/copyparty/releases/tag/v1.20.17) fixed a vuln when a volume has both filekeys and dirkeys enabled
* [v1.20.17 (2026-07-06)](https://github.com/9001/copyparty/releases/tag/v1.20.17) introduced csp nonces, possibly breaking some javascript-based plugins

## πŸ§ͺ new features

* [shadowing](https://github.com/9001/copyparty/#shadowing): filesystem-path `//NULL` will fully unmap a volume from the server's filesystem (no more `/var/lib/empties/4` jank) 88846061

## 🩹 bugfixes

* fix a false-positive warning on startup 12878e6c1cbf4417da42d46230dff686dd48760b

## πŸ”§ other changes

* #1552 #1551 default-disabled the bwrap ffmpeg sandbox; 85a8cc99
  * sandboxing can fail in too many creative ways (funky linux distros with funky filesystem layouts and policies) so autoconfiguring bwrap is not feasible
  * to enable it, set `use-bwrap: y` after adjusting [th-bwrap](https://copyparty.eu/cli/#g-th-bwrap) to match your OS/env
    * see the default `th-bwrap` value in `--help` on your server for a best-effort guess
* always rotate (never overwrite) `-lo` logfiles on startup unless `--rlo no` 29e145f5
* thumbnails: save a tiny bit of I/O by not refreshing expiration-times if `th-clean` (expiration) is disabled anyways e15f2927

## 🌠 fun facts

* no

----

# πŸ’Ύ what to download?
| download link | is it good? | description |
| -- | -- | -- |
| **[copyparty-sfx.py](https://github.com/9001/copyparty/releases/latest/download/copyparty-sfx.py)** | βœ… the best πŸ‘ | runs anywhere! only needs python |
| [copyparty-en.py](https://github.com/9001/copyparty/releases/latest/download/copyparty-en.py) | βœ… also good | same but english-only, no i18n |
| [a docker image](https://github.com/9001/copyparty/blob/hovudstraum/scripts/docker/README.md) | it's ok | good if you prefer docker πŸ‹ |
| [copyparty.exe](https://github.com/9001/copyparty/releases/latest/download/copyparty.exe) |  ⚠️ [acceptable](https://github.com/9001/copyparty#copypartyexe) | for [win8](https://user-images.githubusercontent.com/241032/221445946-1e328e56-8c5b-44a9-8b9f-dee84d942535.png) or later; built-in thumbnailer |
| [u2c.exe](https://github.com/9001/copyparty/releases/download/v1.20.17/u2c.exe) | ⚠️ acceptable | [CLI uploader](https://github.com/9001/copyparty/blob/hovudstraum/bin/u2c.py) as a win7+ exe ([video](https://a.ocv.me/pub/demo/pics-vids/u2cli.webm)) |
| [copyparty.pyz](https://github.com/9001/copyparty/releases/latest/download/copyparty.pyz) | ⚠️ acceptable | similar to the regular sfx, [mostly worse](https://github.com/9001/copyparty#zipapp) |
| [copyparty-en.pyz](https://github.com/9001/copyparty/releases/latest/download/copyparty-en.pyz) | ⚠️ acceptable | english-only, no smb-server |
| [copyparty32.exe](https://github.com/9001/copyparty/releases/latest/download/copyparty32.exe) | ⛔️ [dangerous](https://github.com/9001/copyparty#copypartyexe) | for [win7](https://user-images.githubusercontent.com/241032/221445944-ae85d1f4-d351-4837-b130-82cab57d6cca.png) -- never expose to the internet! |
| [cpp-winpe64.exe](https://github.com/9001/copyparty/releases/download/v1.16.5/copyparty-winpe64.exe) | ⛔️ dangerous | runs on [64bit WinPE](https://user-images.githubusercontent.com/241032/205454984-e6b550df-3c49-486d-9267-1614078dd0dd.png), otherwise useless |
| [bootable usb](https://a.ocv.me/pub/stuff/edcd001/enterprise-edition/) | ┐(οΎŸβˆ€οΎŸ)β”Œ | a surprisingly useful joke (x86_64) |

* except for [u2c.exe](https://github.com/9001/copyparty/releases/download/v1.20.17/u2c.exe), all of the options above are mostly equivalent
* the zip and tar.gz files below are just source code
* python packages are available at [PyPI](https://pypi.org/project/copyparty/#files)