How severe is CVE-2026-27948?

CVE-2026-27948 has a CVSS 3.x base score of 5.4, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2026-27948 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (6th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-27948?

CVE-2026-27948 affects 9001 Copyparty. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-27948?

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

Does CVE-2026-27948 have an EU (EUVD) identifier?

Yes. CVE-2026-27948 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-8813.

When was CVE-2026-27948 published?

CVE-2026-27948 was published on 2026-02-26 and last updated on 2026-06-17.

CVE-2026-27948

CVE-2026-27948 is a medium-severity vulnerability in 9001 Copyparty with a CVSS 3.x base score of 5.4. 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 5.4)
EPSS exploit prediction: 0% (6th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-8813
Weakness: CWE-79
Affected product: 9001 Copyparty
Published: 2026-02-26
Last modified: 2026-06-17

Description

Copyparty is a portable file server. In versions prior to 1.20.9, an XSS allows for reflected cross-site scripting via URL-parameter `?setck=...`. Version 1.20.9 fixes the issue.

Frequently asked questions

What is CVE-2026-27948?: Copyparty is a portable file server. In versions prior to 1.20.9, an XSS allows for reflected cross-site scripting via URL-parameter `?setck=...`. Version 1.20.9 fixes the issue.
How severe is CVE-2026-27948?: CVE-2026-27948 has a CVSS 3.x base score of 5.4, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2026-27948 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (6th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-27948?: CVE-2026-27948 affects 9001 Copyparty. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-27948?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-27948 have an EU (EUVD) identifier?: Yes. CVE-2026-27948 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-8813.
When was CVE-2026-27948 published?: CVE-2026-27948 was published on 2026-02-26 and last updated on 2026-06-17.

References

Affected products (1)

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

More vulnerabilities in 9001 Copyparty

CVE-2023-41471 — High (CVSS 7.8): Cross Site Scripting vulnerability in copyparty before 1.9.2 allows a local attacker to execute arbitrary code via a…
CVE-2025-58753 — High (CVSS 7.5): Copyparty is a portable file server. In versions prior to 1.19.8, there was a missing permission-check in the shares…
CVE-2025-54796 — High (CVSS 7.5): Copyparty is a portable file server. Versions prior to 1.18.9, the filter parameter for the "Recent Uploads" page…
CVE-2023-37474 — High (CVSS 7.5): Copyparty is a portable file server. Versions prior to 1.8.2 are subject to a path traversal vulnerability detected in…
CVE-2026-32108 — Medium (CVSS 6.5): Copyparty is a portable file server. Prior to 1.20.12, there was a missing permission-check in the shares feature (the…
CVE-2025-54589 — Medium (CVSS 6.3): Copyparty is a portable file server. In versions 1.18.6 and below, when accessing the recent uploads page at `/?ru`,…

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