How severe is CVE-2026-25890?

CVE-2026-25890 has a CVSS 3.x base score of 8.1, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability none.

Is CVE-2026-25890 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (37th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-25890?

CVE-2026-25890 affects Filebrowser. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-25890?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2026-25890 have an EU (EUVD) identifier?

Yes. CVE-2026-25890 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-6866.

When was CVE-2026-25890 published?

CVE-2026-25890 was published on 2026-02-09 and last updated on 2026-06-17.

CVE-2026-25890

CVE-2026-25890 is a high-severity vulnerability in Filebrowser with a CVSS 3.x base score of 8.1. 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-863.

Key facts

Severity: High (CVSS 3.x base score 8.1)
EPSS exploit prediction: 0% (37th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-6866
Weakness: CWE-863
Affected product: Filebrowser
Published: 2026-02-09
Last modified: 2026-06-17

Description

File Browser provides a file managing interface within a specified directory and it can be used to upload, delete, preview, rename and edit files. Prior to 2.57.1, an authenticated user can bypass the application's "Disallow" file path rules by modifying the request URL. By adding multiple slashes (e.g., //private/) to the path, the authorization check fails to match the rule, while the underlying filesystem resolves the path correctly, granting unauthorized access to restricted files. This vulnerability is fixed in 2.57.1.

Frequently asked questions

What is CVE-2026-25890?: File Browser provides a file managing interface within a specified directory and it can be used to upload, delete, preview, rename and edit files. Prior to 2.57.1, an authenticated user can bypass the application's "Disallow" file path rules by modifying the request URL. By adding multiple slashes (e.g., //private/) to the path, the authorization check fails to match the rule, while the underlying filesystem resolves the path correctly, granting unauthorized access to restricted files. This vulnerability is fixed in 2.57.1.
How severe is CVE-2026-25890?: CVE-2026-25890 has a CVSS 3.x base score of 8.1, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability none.
Is CVE-2026-25890 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (37th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-25890?: CVE-2026-25890 affects Filebrowser. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-25890?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2026-25890 have an EU (EUVD) identifier?: Yes. CVE-2026-25890 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-6866.
When was CVE-2026-25890 published?: CVE-2026-25890 was published on 2026-02-09 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:filebrowser:filebrowser:*:*:*:*:*:*:*:*

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