CVE-2026-25138: medium-severity vulnerability in rucio
Rucio WebUI has Username Enumeration via Login Error Message
Published · Updated
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13Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 5.3epss 0.4%
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:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Affected products
rucio · rucioRelated CVEs — rucio
In the same product, most dangerous first.
CVE-2026-58273HIGHRucio: Authorisation Bypass on REST API endpoint for signing URLsEPSS 0.6%CVE-2026-25736MEDIUMRucio WebUI has a Stored Cross-site Scripting (XSS) Vulnerability in its Custom RSE AttributeEPSS 0.3%CVE-2026-25735MEDIUMRucio WebUI has a Stored Cross-site Scripting (XSS) vulnerability its Identity NameEPSS 0.3%CVE-2026-25734MEDIUMRucio WebUI has Stored Cross-site Scripting (XSS) in RSE MetadataEPSS 0.3%CVE-2026-25136HIGHRucio WebUI has a Reflected Cross-site Scripting VulnerabilityEPSS 0.3%CVE-2026-25733HIGHRucio WebUI Vulnerable to Stored Cross-site Scripting (XSS) through Custom Rule FunctionEPSS 0.3%
References
https://cheatsheetseries.owasp.org/cheatsheets/Authentication_Cheat_Sheet.html#authentication-and-error-messageshttps://github.com/rucio/rucio/releases/tag/35.8.3https://github.com/rucio/rucio/releases/tag/38.5.4https://github.com/rucio/rucio/releases/tag/39.3.1https://github.com/rucio/rucio/security/advisories/GHSA-38wq-6q2w-hcf9