CVE-2026-30974: Copyparty is a portable file server

Q: How do I fix CVE-2026-30974?

copyparty: upgrade to 1.20.11. Exact commands for each OS are on this page.

Q: Is CVE-2026-30974 being exploited?

CVE-2026-30974 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-2026-30974 affect?

CVE-2026-30974 affects copyparty. Severity is medium (CVSS 4.6). Copyparty is a portable file server. Prior to v1.20.11., the nohtml config option, intended to prevent execution of JavaScript in user-uploaded HTML files, did not apply to SVG images. A user with write-permission could upload an SVG contai

Q: How urgent is CVE-2026-30974?

Priority 23/100. No elevated risk signals yet.

Routine

MEDIUM 4.6UPGRADE

CVE-2026-30974 is a medium-severity flaw (CVSS 4.6) 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. Prior to v1.20.11., the nohtml config option, intended to prevent execution of JavaScript in user-uploaded HTML files, did not apply to SVG images. A user with write-permission could upload an SVG containing embedded JavaScript, which would execute in the context of whichever user opens it. This has been fixed in v1.20.11.

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	4.6 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	Required
EPSS exploit chance	0.3% (top 72%)
CISA exploited list	No
Weakness	CWE-79
Published	2026-03-10
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

2026-03-10 18:18 UTCPublished CVE record published
2026-06-17 10:33 UTCUpdated Record last modified

9001 copyparty UPGRADE

Affected: < 1.20.11

Fixed in: 1.20.11

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to 1.20.11 (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-2026-30974?

copyparty: upgrade to 1.20.11. Exact commands for each OS are on this page.

Is CVE-2026-30974 being exploited?

CVE-2026-30974 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-2026-30974 affect?

CVE-2026-30974 affects copyparty. Severity is medium (CVSS 4.6). Copyparty is a portable file server. Prior to v1.20.11., the nohtml config option, intended to prevent execution of JavaScript in user-uploaded HTML files, did not apply to SVG images. A user with write-permission could upload an SVG contai

How urgent is CVE-2026-30974?

Priority 23/100. No elevated risk signals yet.

Related CVEs

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-2025-54796 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

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