{"cve":"CVE-2026-25138","nvd":{"published":"2026-02-25T20:23:47.457","modified":"2026-06-17T10:24:10.423","status":"Analyzed","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_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N","score":5.3},"cwes":["CWE-204"],"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"],"products":["cern:rucio"],"source":"nvd","synced_at":"2026-10-19T22:24:17.937441719+00:00"},"epss":{"cve":"CVE-2026-25138","score":0.00375,"percentile":0.31539,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-38wq-6q2w-hcf9","url":"https://osv.dev/vulnerability/GHSA-38wq-6q2w-hcf9","summary":"Rucio WebUI has Username Enumeration via Login Error Message","modified":"2026-07-13T16:42:31.939877416Z","packages":[{"ecosystem":"PyPI","name":"rucio-webui","purl":"pkg:pypi/rucio-webui","ranges":["<35.8.3"],"fixed":["35.8.3"]},{"ecosystem":"PyPI","name":"rucio-webui","purl":"pkg:pypi/rucio-webui","ranges":[">=36.0.0rc1 <38.5.4"],"fixed":["38.5.4"]},{"ecosystem":"PyPI","name":"rucio-webui","purl":"pkg:pypi/rucio-webui","ranges":[">=39.0.0rc1 <39.3.1"],"fixed":["39.3.1"]}]},{"id":"PYSEC-2026-3053","url":"https://osv.dev/vulnerability/PYSEC-2026-3053","summary":"Rucio WebUI has Username Enumeration via Login Error Message","modified":"2026-07-13T16:32:44.020543348Z","packages":[{"ecosystem":"PyPI","name":"rucio-webui","purl":"pkg:pypi/rucio-webui","ranges":["<35.8.3",">=36.0.0rc1 <38.5.4",">=39.0.0rc1 <39.3.1"],"fixed":["35.8.3","38.5.4","39.3.1"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}