copyparty allows Regex Denial of Service (ReDoS) in the upload listing
Summary
The filter parameter for the "Recent uploads" page allows arbitrary Regexes. If this feature is enabled (which is the default), an attacker can craft a filter which deadlocks the server.
PoC
https://127.0.0.1:3923/?ru&filter=(.+)+x
Impact
The server becomes fully inaccessible for a long time.
Affected software
Click a technology to see all vulnerabilities affecting it.
| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| Python (PyPI) | copyparty | < 1.18.9 | 1.18.9 |
References
- https://github.com/9001/copyparty/security/advisories/GHSA-5662-2rj7-f2v6
- https://nvd.nist.gov/vuln/detail/CVE-2025-54796
- https://github.com/9001/copyparty/commit/09910ba80784c3980947d92f45db696398c0fd83
- https://github.com/9001/copyparty
- https://github.com/9001/copyparty/releases/tag/v1.18.9
- https://pypi.org/project/copyparty
- https://github.com/advisories/GHSA-5662-2rj7-f2v6
- CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H- Weakness (CWE)
CWE-1333- Platform
- Python (PyPI)
- Package
copyparty- Disclosed
- 04.08.2025
- Updated
- 11.10.2026 15:17
Sources and licenses
OSV / GitHub Advisory Database - PYSEC-2026-1275 - PyPA Advisory Database; CC BY 4.0
OSV / GitHub Advisory Database - GHSA-5662-2rj7-f2v6 - CC BY 4.0
Vulnerability history: copyparty
All published vulnerabilities of this package (Python (PyPI)), newest first. Shows whether this is a one-off slip or a package that needs watching.
- Total entries
- 14
- First → latest
- 07.2023 08.2026
- Without a fix
- 1
- Exploited in attacks
- 0
Severity breakdown
- High 3
- Medium 8
- Low 3
Disclosures per year
- 2023: 3
- 2024: 0
- 2025: 6
- 2026: 5
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copyparty allows Regex Denial of Service (ReDoS) in the upload listing this entry
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