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Medium · 6.1 CVE-2026-25734 EUVD-2026-8727GHSA-h9fp-p2p9-873qPYSEC-2026-3057

Rucio WebUI has Stored Cross-site Scripting (XSS) in RSE Metadata

Published Feb 25, 2026 · Updated Feb 26, 2026 · Assigned by GitHub_M

Description

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 RSE metadata 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.

Affected products

VendorProductAffectedFixed
rucio rucio < 35.8.3, >= 36.0.0rc1, < 38.5.4, >= 39.0.0rc1, < 39.3.1 —

Affected packages

EcosystemPackageAffectedFixedRecord
PyPI rucio-webui < 35.8.3 35.8.3 GHSA-h9fp-p2p9-873q
PyPI rucio-webui >= 36.0.0rc1, < 38.5.4 38.5.4 GHSA-h9fp-p2p9-873q
PyPI rucio-webui >= 39.0.0rc1, < 39.3.1 39.3.1 GHSA-h9fp-p2p9-873q
PyPI rucio-webui < 35.8.3 · >= 36.0.0rc1, < 38.5.4 · >= 39.0.0rc1, < 39.3.1 35.8.3, 38.5.4, 39.3.1 PYSEC-2026-3057

References