CVE-2025-54796: Copyparty is a portable file server

Q: How do I fix CVE-2025-54796?

copyparty: upgrade to 1.18.9. Exact commands for each OS are on this page.

Q: Is CVE-2025-54796 being exploited?

CVE-2025-54796 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2025-54796 affect?

CVE-2025-54796 affects copyparty. Severity is high (CVSS 7.5). 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 th

Q: How urgent is CVE-2025-54796?

Priority 46/100. High severity; Public exploit reference; Remotely exploitable, no login, no user action

This week

HIGH 7.5REMOTEUPGRADE

CVE-2025-54796 is a high-severity flaw (CVSS 7.5) affecting copyparty. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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.

Why this priority

High severity
Public exploit reference
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	7.5 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.5% (top 60%)
CISA exploited list	No
Weakness	CWE-400, CWE-833, CWE-1333
Published	2025-08-02
Last modified	2026-06-17

Publisher (CNA): GitHub, Inc. · Vendor: 9001

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2025-08-02 00:15 UTCPublished CVE record published
2026-06-17 09:40 UTCUpdated Record last modified

9001 copyparty UPGRADE

Affected: < 1.18.9

Fixed in: 1.18.9

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy copyparty || rpm -q copyparty || copyparty --version

2. UPGRADE to 1.18.9 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade copyparty

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade copyparty

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2025-54796?

copyparty: upgrade to 1.18.9. Exact commands for each OS are on this page.

Is CVE-2025-54796 being exploited?

CVE-2025-54796 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2025-54796 affect?

CVE-2025-54796 affects copyparty. Severity is high (CVSS 7.5). 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 th

How urgent is CVE-2025-54796?

Priority 46/100. High severity; Public exploit reference; Remotely exploitable, no login, no user action

Related CVEs

CVE-2026-30974 MEDIUM 4.6 UPGRADE Copyparty is a portable file server
CVE-2026-27948 MEDIUM 5.4 UPGRADE Copyparty is a portable file server
CVE-2025-58753 HIGH 7.5 UPGRADE Copyparty is a portable file server
CVE-2025-54589 MEDIUM 6.3 UPGRADE Copyparty is a portable file server
CVE-2025-54423 MEDIUM 5.4 UPGRADE copyparty is a portable file server

References

← Back to latest CVEs