Back
CVE-2026-25138
Rucio WebUI has Username Enumeration via Login Error Message
Medium5.3EPSS 0.38%
- Published
- Updated
- Reserved
- Assigned by
- GitHub_M
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.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| GitHub_MCNA (assigner) | 3.1 | Medium5.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N |
| NVDNVD · Analyzed | 3.1 | Medium5.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N |
- EPSS (exploitation in 30 days)
- 0.38% · top 68% of all CVEs (7 Nov 2026)
- CISA SSVC
- Exploitation: poc · Automatable: yes · Technical impact: partial
Loading the EPSS history…
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.3.
Weakness
Affected products
Affected packages
From reviewed advisories of the GitHub Advisory Database.
- PyPIrucio-webuiGHSA-38wq-6q2w-hcf9 (opens in a new tab)
References (5)
- https://github.com/rucio/rucio/security/advisories/GHSA-38wq-6q2w-hcf9 (opens in a new tab)x_refsource_CONFIRMexploit
- https://cheatsheetseries.owasp.org/cheatsheets/Authentication_Cheat_Sheet.html#authentication-and-error-messages (opens in a new tab)x_refsource_MISC
- https://github.com/rucio/rucio/releases/tag/35.8.3 (opens in a new tab)x_refsource_MISC
- https://github.com/rucio/rucio/releases/tag/38.5.4 (opens in a new tab)x_refsource_MISC
- https://github.com/rucio/rucio/releases/tag/39.3.1 (opens in a new tab)x_refsource_MISC
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisory GHSA-38wq-6q2w-hcf9 (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2026-25138)Record last updated .