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Vulnerability record · CVE-2026-25138 · published 25 February 2026

CVE-2026-25138: Cern rucio vulnerability

Cern · Rucio

Rucio is a software framework that provides functionality to organize, manage, and access large volumes of scientific data using customizable policies. Prior to versions 35.8.3, 38.5.4, and 39.3.1, the WebUI login endpoint returns distinct error messages depending on whether a supplied username exists, allowing unauthenticated attackers to enumerate valid usernames. Versions 35.8.3, 38.5.4, and 39.3.1 fix the issue.

5.3 CVSS 3.1 Medium EPSS 0.33% · top 76.0% CWE-204 · CWE-204
5.3CVSS 3.1 base score
0.33%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
6References, 2 tagged exploit
17 Jun 2026Last modified by NVD

Description

Rucio is a software framework that provides functionality to organize, manage, and access large volumes of scientific data using customizable policies. Prior to versions 35.8.3, 38.5.4, and 39.3.1, the WebUI login endpoint returns distinct error messages depending on whether a supplied username exists, allowing unauthenticated attackers to enumerate valid usernames. Versions 35.8.3, 38.5.4, and 39.3.1 fix the issue.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://cheatsheetseries.owasp.org/cheatsheets/Authentication_Cheat_Sheet.html#authentication-and-error-messages Not Applicable
https://github.com/rucio/rucio/releases/tag/35.8.3 ProductRelease Notes
https://github.com/rucio/rucio/releases/tag/38.5.4 ProductRelease Notes
https://github.com/rucio/rucio/releases/tag/39.3.1 ProductRelease Notes
https://github.com/rucio/rucio/security/advisories/GHSA-38wq-6q2w-hcf9 ExploitVendor Advisory
https://github.com/rucio/rucio/security/advisories/GHSA-38wq-6q2w-hcf9 ExploitVendor Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.4CVE-2026-29080Cern rucio sql injection vulnerabilityA SQL injection vulnerability in `FilterEngine.create_sqla_query()` allows any authenticated Rucio user to execute arbitrary SQL against the backend …EPSS 0.52%9.0CVE-2026-29090Cern rucio sql injection vulnerability### Summary A SQL injection vulnerability exists in Rucio versions 1.30.0 and later before 35.8.5, 38.5.5, 39.4.2, and 40.1.1, in `FilterEngine.creat…EPSS 0.54%6.1CVE-2026-25136Cern rucio cross-site scripting vulnerabilityRucio is a software framework that provides functionality to organize, manage, and access large volumes of scientific data using customizable policie…EPSS 0.27%5.4CVE-2026-25733Cern rucio cross-site scripting vulnerabilityRucio is a software framework that provides functionality to organize, manage, and access large volumes of scientific data using customizable policie…EPSS 0.42%4.8CVE-2026-25735Cern rucio cross-site scripting vulnerabilityRucio is a software framework that provides functionality to organize, manage, and access large volumes of scientific data using customizable policie…EPSS 0.46%4.8CVE-2026-25736Cern rucio cross-site scripting vulnerabilityRucio is a software framework that provides functionality to organize, manage, and access large volumes of scientific data using customizable policie…EPSS 0.46%4.8CVE-2026-25734Cern rucio cross-site scripting vulnerabilityRucio is a software framework that provides functionality to organize, manage, and access large volumes of scientific data using customizable policie…EPSS 0.46%

Source: NIST National Vulnerability Database (record CVE-2026-25138), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.