Rucio
CVE-2026-25736
MEDIUM
GHSA-fq4f-4738-rqxm
Severity by source
AV:N/AC:L/PR:H/UI:R/S:U/C:H/I:H/A:N
Primary rating from GitHub Advisory · only source for this CVE.
CVSS VectorGitHub Advisory
Lifecycle Timeline
4DescriptionGitHub Advisory
Rucio is a software framework that provides functionality to organize, manage, and access large volumes of scientific data using customizable policies. Versions prior to 35.8.3, 38.5.4, and 39.3.1 have a stored Cross-Site Scripting (XSS) vulnerability in the Custom RSE Attribute of the WebUI where attacker-controlled input is persisted by the backend and later rendered in the WebUI without proper output encoding. This allows arbitrary JavaScript execution in the context of the WebUI for users who view affected pages, potentially enabling session token theft or unauthorized actions. Versions 35.8.3, 38.5.4, and 39.3.1 fix the issue.
AnalysisAI
Stored XSS in Rucio's WebUI Custom RSE Attribute field allows authenticated attackers to inject malicious JavaScript that persists in the backend and executes for any user viewing affected pages, potentially leading to session hijacking or unauthorized actions. Public exploit code exists for this vulnerability, which affects Rucio versions prior to 35.8.3, 38.5.4, and 39.3.1. No patch is currently available for all affected versions.
Technical ContextAI
Classified as CWE-79 (Cross-site Scripting (XSS)). Affects Rucio. Rucio is a software framework that provides functionality to organize, manage, and access large volumes of scientific data using customizable policies. Versions prior to 35.8.3, 38.5.4, and 39.3.1 have a stored Cross-Site Scripting (XSS) vulnerability in the Custom RSE Attribute of the WebUI where attacker-controlled input is persisted by the backend and later rendered in the WebUI without proper output encoding. This allows arbitrary JavaScript execution in the context of the WebUI for users wh
RemediationAI
Monitor vendor advisories for a patch. Implement output encoding and Content Security Policy headers. Restrict network access to the affected service where possible.
Session hijacking in Rucio's WebUI error page allows unauthenticated attackers to steal user login tokens via reflected
Stored XSS in Rucio's WebUI Custom Rules function allows authenticated attackers to inject malicious JavaScript that per
Stored XSS in Rucio's WebUI Identity Name field allows authenticated attackers to inject malicious scripts that execute
Stored XSS in Rucio's WebUI RSE metadata allows authenticated attackers to inject malicious scripts that execute in user
Rucio's WebUI login endpoint prior to versions 35.8.3, 38.5.4, and 39.3.1 discloses whether usernames exist through diff
Same weakness CWE-79 – Cross-site Scripting (XSS)
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External POC / Exploit Code
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