{"id":"CVE-2026-25138","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-25138","generatedAt":"2026-10-28T02:23:00.346Z","title":"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.","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.","published":"2026-02-25T20:23:47.000Z","lastModified":"2026-06-17T10:24:10.000Z","status":"Analyzed","sourceIdentifier":"security-advisories@github.com","cvss":{"version":"3.1","score":5.3,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N"},"cwe":["CWE-204"],"affected":["cern/rucio"],"epss":{"score":0.00375,"percentile":0.31266,"date":"2026-10-26","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"low","text":"Lower severity and a low EPSS score (0.38%). Track it; it rarely justifies an emergency change on its own."},"changes":[],"references":[{"url":"https://cheatsheetseries.owasp.org/cheatsheets/Authentication_Cheat_Sheet.html#authentication-and-error-messages","tags":["Not Applicable"],"source":"security-advisories@github.com"},{"url":"https://github.com/rucio/rucio/releases/tag/35.8.3","tags":["Product","Release Notes"],"source":"security-advisories@github.com"},{"url":"https://github.com/rucio/rucio/releases/tag/38.5.4","tags":["Product","Release Notes"],"source":"security-advisories@github.com"},{"url":"https://github.com/rucio/rucio/releases/tag/39.3.1","tags":["Product","Release Notes"],"source":"security-advisories@github.com"},{"url":"https://github.com/rucio/rucio/security/advisories/GHSA-38wq-6q2w-hcf9","tags":["Exploit","Vendor Advisory"],"source":"security-advisories@github.com"},{"url":"https://github.com/rucio/rucio/security/advisories/GHSA-38wq-6q2w-hcf9","tags":["Exploit","Vendor Advisory"],"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-25138","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}