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.
References (5)
Core 5
Core References
Vendor Advisory x_refsource_confirm
https://github.com/rucio/rucio/security/advisories/GHSA-38wq-6q2w-hcf9
Various Sources x_refsource_misc
https://cheatsheetseries.owasp.org/cheatsheets/Authentication_Cheat_Sheet.html#authentication-and-error-messages
Release Notes x_refsource_misc
https://github.com/rucio/rucio/releases/tag/35.8.3
Release Notes x_refsource_misc
https://github.com/rucio/rucio/releases/tag/38.5.4
Release Notes x_refsource_misc
https://github.com/rucio/rucio/releases/tag/39.3.1
Scores
CVSS v3
5.3
EPSS
0.0033
EPSS Percentile
24.3%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
CISA SSVC
Vulnrichment
Exploitation
poc
Automatable
yes
Technical Impact
partial
Details
CWE
CWE-204
Status
published
Products (2)
cern/rucio
< 35.8.3
pypi/rucio-webui
0 - 35.8.3PyPI
Published
Feb 25, 2026
Tracked Since
Feb 26, 2026