copyparty allows Regex Denial of Service (ReDoS) in the upload listing (CVE-2025-54796) | HOL Guard CVE

High · CVSS 7.5CVE-2025-54796GHSA-5662-2RJ7-F2V6

copyparty allows Regex Denial of Service (ReDoS) in the upload listing

Answer in brief

CVE-2025-54796 records a High severity (CVSS 7.5) vulnerability in copyparty allows Regex Denial of Service (ReDoS) in the upload listing. The current sources do not mark it as known exploited. The current feed maps copyparty (pypi). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Aug 4, 2025Updated Sep 10, 2026Source checked Sep 10, 2026First seen by HOL Sep 10, 2026Material review Sep 10, 2026

Upstream Advisory

Key facts

Risk: High · CVSS 7.5
Exploitation: Not marked as known exploited
Affected software: 1 mapped package or product
Fix availability: Available

Why this deserves its current priority

CVSS is 7.5. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps copyparty (pypi). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
copypartypypi	>=0 <1.18.9	1.18.9

Recommended response

Check inventory. Check lockfiles and deployed manifests for copyparty.
Review the reported fix. Update copyparty to 1.18.9 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Aug 4, 2025
Evidence: source:osv:source_dates:source-dates:record
Source modified
Sep 10, 2026
Evidence: source:osv:source_dates:source-dates:record
First seen by HOL
Sep 10, 2026

Sources and claim methodology

Upstream source description

### 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.

Quoted source text, attributed separately from HOL analysis.