{"id":"CVE-2026-25138","summary":"Rucio WebUI has Username Enumeration via Login Error Message","details":"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.","aliases":["GHSA-38wq-6q2w-hcf9","PYSEC-2026-3053"],"modified":"2026-08-12T03:51:44.700777354Z","published":"2026-02-25T19:28:35.628Z","database_specific":{"cwe_ids":["CWE-204"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/25xxx/CVE-2026-25138.json","cna_assigner":"GitHub_M"},"references":[{"type":"WEB","url":"https://cheatsheetseries.owasp.org/cheatsheets/Authentication_Cheat_Sheet.html#authentication-and-error-messages"},{"type":"WEB","url":"https://github.com/rucio/rucio/releases/tag/35.8.3"},{"type":"WEB","url":"https://github.com/rucio/rucio/releases/tag/38.5.4"},{"type":"WEB","url":"https://github.com/rucio/rucio/releases/tag/39.3.1"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/25xxx/CVE-2026-25138.json"},{"type":"ADVISORY","url":"https://github.com/rucio/rucio/security/advisories/GHSA-38wq-6q2w-hcf9"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-25138"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/rucio/rucio","events":[{"introduced":"0"},{"fixed":"ba9203702629af7bb1f95d5cf9ba8fcf1f943105"},{"introduced":"46cc73438ba4042ac937fff1c5a0dfabc83e91f3"},{"fixed":"c851ad216e0e0e3d50405eab3331dfe21c96ddd3"},{"introduced":"45b19709d28ecccc39cd0e73e4087a7e79a71c49"},{"fixed":"ba2a7e66b1e3c73b5cf9e0000e6621e8dc45bfe7"}],"database_specific":{"cpe":"cpe:2.3:a:cern:rucio:*:*:*:*:*:*:*:*","extracted_events":[{"introduced":"0"},{"fixed":"35.8.3"},{"introduced":"36.0.0"},{"fixed":"38.5.4"},{"introduced":"39.0.0"},{"fixed":"39.3.1"}],"source":["CPE_RANGE","REFERENCES"]}}],"versions":["35.8.2","39.3.0","38.5.3","38.5.2","39.2.0","38.5.1","39.1.0","39.0.0","38.5.0","38.4.0","38.3.0","38.2.0","35.8.0","38.1.0","38.0.0","38.0.0rc3","38.0.0rc2","38.0.0rc1","37.0.0","37.0.0rc4","37.0.0rc3","37.0.0rc2","37.0.0rc1","35.7.0","35.6.1","36.0.0","35.6.0","35.5.0","35.4.1","35.4.0","35.3.0","35.2.1","35.2.0","35.1.1","35.1.0","35.0.1","35.0.0","35.0.0rc2","35.0.0rc1","34.0.0","34.0.0rc2","34.0.0rc1","33.0.0","33.0.0rc3","33.0.0rc2","33.0.0rc1","32.0.0","32.0.0rc2","32.0.0rc1","1.31.0","1.30.0","1.30.0rc3","1.30.0rc2","1.30.0rc1","1.29.0rc1","1.29.0","1.29.0rc2","1.28.0","1.28.0rc2","1.28.0rc1","1.27.0rc2","1.27.0","1.27.0rc1","1.26.0","1.26.0rc2","1.26.0rc1","1.25.0","1.25.0rc2","1.25.0rc1","1.24.0","1.24.0rc1","1.23.0","1.22.8","1.22.7","1.22.6","1.22.5","1.22.4","1.22.4.dev1","1.22.2","1.22.3","1.22.1","1.22.0","1.21.12","1.21.11","1.21.10","1.21.9","1.21.8","1.21.7","1.21.6","1.21.5","1.21.4","1.21.3","1.21.2","1.21.1","1.21.0","1.20.8","1.20.7","1.20.6","1.20.5","1.20.4","1.20.4rc3","1.20.4rc2","1.20.4rc1","1.20.3","1.20.3rc2","1.20.3rc1","1.20.2","1.20.1","1.20.0","1.19.8","1.19.7","1.19.6","1.19.5","1.19.4","1.19.3","1.19.1","1.19.2","1.19.0","1.18.9","1.18.8","1.18.7","1.18.6","1.18.5","1.18.4","1.18.3","1.18.2","1.18.1","1.17.8","1.18.0","1.17.7","1.17.6","1.17.5","1.17.4","1.17.3","1.17.2","1.17.1","1.17.0","1.16.4","1.16.3","1.16.2","1.16.1","1.16.0","1.15.4","1.15.5","1.15.3","1.15.0","1.15.2","1.15.1","1.14.11","1.14.9","1.14.10","1.14.8","1.14.7","1.14.6","1.14.5","1.14.2","1.14.4","1.14.3","1.14.0.post1","1.14.1.post1","1.13.3","1.13.1","1.13.0","1.12.6","1.12.5","1.12.4","1.12.3","1.12.2","1.12.1","1.12.0","1.11.4","1.11.3","1.11.0","1.11.2","1.11.1","1.10.7","1.10.6","1.10.5","1.10.4","1.10.3","1.10.2","1.10.1","1.10.0","1.9.6","1.9.5","1.9.4","1.9.3","1.9.2","1.9.1","1.8.5","1.9.0","1.8.4","1.8.3","1.8.2","1.8.1","1.8.0","1.7.3","1.7.2","1.7.1","1.7.0","1.6.8","1.6.7","1.6.5","1.6.6","1.6.4","1.6.3","1.6.2","1.6.1","1.6.0","1.5.11","1.5.12","1.5.10","1.5.9","1.5.7","1.5.6","1.5.5","1.5.4","1.5.3","1.5.2","1.5.1","1.5.0","1.4.6","1.4.5","1.4.4","1.4.2","1.4.3","1.4.1","1.4.0","1.3.3","1.3.2","1.3.1.post1","1.3.1","1.3.0.post1","1.2.4","1.2.5","1.2.3","1.2.2","1.2.1","1.2.0","1.1.3","1.1.2","1.1.1","1.1.0","1.0.1","1.0.0","0.3.10","0.3.9","0.3.8","0.3.7","0.3.6","0.3.5","0.3.4","0.3.3","0.3.2","0.3.1","0.3.0","0.2.14","0.2.13","0.2.12","0.2.11","0.2.10","0.2.9","0.2.8","0.2.7","0.2.6","0.2.5","0.2.4","0.2.3","0.2.2","0.2.1","0.2.0","0.1.35","0.1.34","0.1.33","0.1.32","0.1.31","0.1.30","0.1.29","0.1.28","0.1.27","0.1.26","0.1.25","0.1.24","0.1.23","0.1.22","0.1.21","0.1.20","0.1.19","0.1.18","0.1.17","0.1.16","0.1.15","0.1.14","0.1.13","0.1.12","0.1.11","0.1.10","0.1.9","0.1.8","0.1.7"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-25138.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N"}]}