GHSA-38wq-6q2w-hcf9 · Severity: medium · Ecosystem: pip — Rucio WebUI has Username Enumeration via Login Error Message
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.
Conclusion & alert: CVE-2026-25138 is rated Exploit Available (50/100): CVSS Medium severity, with low exploitation likelihood (EPSS 0.33%). Core evidence: 1 public exploit reference(s) are indexed (Exploit-DB). Mandatory action: Public exploits are available—assess exposure, apply mitigations, and prioritize patching.
Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.
| EDB-ID | Source | Kind | Published | Link |
|---|---|---|---|---|
| — | nvd_ref | exploit_tag | Exploit-DB ↗ |
EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).
| # | Date | Old EPSS score | New EPSS score | Delta (New - Old) |
|---|---|---|---|---|
| 1 | 2026-06-15 | 0.05% | 0.33% | +0.28% |
| 2 | 2026-03-21 | 0.03% | 0.05% | +0.02% |
| 3 | 2026-02-26 | — | 0.03% | — |
Full EPSS history (3 records total)
CVSS metrics for this CVE.
| Base score | Version | Severity | Vector | Exploitability | Impact | Score source |
|---|---|---|---|---|---|---|
| 5.3 | 3.1 | MEDIUM |
|
3.9 | 1.4 | [email protected] |
GHSA-38wq-6q2w-hcf9 · Severity: medium · Ecosystem: pip — Rucio WebUI has Username Enumeration via Login Error Message
| URL | Tags |
|---|---|
| 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 | Product Release Notes |
| https://github.com/rucio/rucio/releases/tag/38.5.4 | Product Release Notes |
| https://github.com/rucio/rucio/releases/tag/39.3.1 | Product Release Notes |
| https://github.com/rucio/rucio/security/advisories/GHSA-38wq-6q2w-hcf9 | Exploit Vendor Advisory |