PYSEC-2026-1275 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...

PYSEC-2026-1276 copyparty Reflected XSS via Filter Parameter

Summary Unauthorized reflected Cross-Site-Scripting when accessing the URL for recent uploads with the filter parameter containing JavaScript code. Details When accessing the recent uploads page at /?ru, users can filter the results using an input field at the top. This field appends a filter...

Regular Expression Denial Of Service (ReDoS)

copyparty is vulnerable to Regular Expression Denial of Service ReDoS. The vulnerability is due to allowing arbitrary RegEx inputs in the filter parameter of the "Recent Uploads" page, which allows an attacker to craft a malicious regex that deadlocks the server...

Cross-Site Scripting

Copyparty is vulnerable to reflected Cross-Site Scripting XSS. The vulnerability is due to improper escaping of user-supplied input in the filter parameter on the recent uploads page, which is reflected into a...

Denial of Service (DoS)

Overview Affected versions of this package are vulnerable to Denial of Service DoS via the filter parameter in the Recent Uploads page. An attacker can cause the server to become unresponsive by submitting specially crafted regular expressions. Note: This is exploitable if the Recent Uploads...

CVE-2025-54796

Copyparty is a portable file server. Versions prior to 1.18.9, 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. This is fixed in version 1.18.9...

CVE-2025-54796 Copyparty is vulnerable to Regex Denial of Service (ReDoS) attacks through "Recent Uploads" page

Copyparty is a portable file server. Versions prior to 1.18.9, 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. This is fixed in version 1.18.9...

CVE-2025-54796 Copyparty is vulnerable to Regex Denial of Service (ReDoS) attacks through "Recent Uploads" page

Copyparty is a portable file server. Versions prior to 1.18.9, 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. This is fixed in version 1.18.9...

CVE-2025-54796

CVE-2025-54796 concerns Copyparty, a portable file server. The vulnerability affects versions prior to 1.18.9 where the filter parameter on the "Recent Uploads" page accepts arbitrary RegExes. When this feature is enabled (the default), an attacker can craft a regex-based filter that deadlocks th...