How severe is CVE-2026-30974?

CVE-2026-30974 has a CVSS 3.x base score of 4.6, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2026-30974 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (24th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-30974?

CVE-2026-30974 affects 9001 Copyparty. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-30974?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-30974 have an EU (EUVD) identifier?

Yes. CVE-2026-30974 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-10711.

When was CVE-2026-30974 published?

CVE-2026-30974 was published on 2026-03-10 and last updated on 2026-06-17.

CVE-2026-30974

CVE-2026-30974 is a medium-severity vulnerability in 9001 Copyparty with a CVSS 3.x base score of 4.6. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-79.

Key facts

Severity: Medium (CVSS 3.x base score 4.6)
EPSS exploit prediction: 0% (24th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-10711
Weakness: CWE-79
Affected product: 9001 Copyparty
Published: 2026-03-10
Last modified: 2026-06-17

Description

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.

Frequently asked questions

What is CVE-2026-30974?: 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.
How severe is CVE-2026-30974?: CVE-2026-30974 has a CVSS 3.x base score of 4.6, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2026-30974 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (24th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-30974?: CVE-2026-30974 affects 9001 Copyparty. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-30974?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-30974 have an EU (EUVD) identifier?: Yes. CVE-2026-30974 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-10711.
When was CVE-2026-30974 published?: CVE-2026-30974 was published on 2026-03-10 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:9001:copyparty:*:*:*:*:*:*:*:*

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