CVSS 3.1
5.3 mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:NCVE-2026-25138
Medium (5.3) in cern rucio. EPSS 0.4% chance of exploitation in the next 30 days. Fixed in rucio-webui 35.8.3, 38.5.4, 39.3.1.
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.
Severity
- EPSS
- 0.4% chance of exploitation in the next 30 days; higher than 31% of CVEs (scores of 2026-10-31)
- CWE
- CWE-204
- Published
- Modified
- Record from
- the NVD, synced
Affected
- cern:rucio
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-38wq-6q2w-hcf9 | PyPI | rucio-webui | <35.8.3 | 35.8.3 |
| GHSA-38wq-6q2w-hcf9 | PyPI | rucio-webui | >=36.0.0rc1 <38.5.4 | 38.5.4 |
| GHSA-38wq-6q2w-hcf9 | PyPI | rucio-webui | >=39.0.0rc1 <39.3.1 | 39.3.1 |
| PYSEC-2026-3053 | PyPI | rucio-webui | <35.8.3 >=36.0.0rc1 <38.5.4 >=39.0.0rc1 <39.3.1 | 35.8.3, 38.5.4, 39.3.1 |
References
- https://cheatsheetseries.owasp.org/cheatsheets/Authentication_Cheat_Sheet.html#authentication-and-error-messages
- https://github.com/rucio/rucio/releases/tag/35.8.3
- https://github.com/rucio/rucio/releases/tag/38.5.4
- https://github.com/rucio/rucio/releases/tag/39.3.1
- https://github.com/rucio/rucio/security/advisories/GHSA-38wq-6q2w-hcf9