Vulnerability · Published Feb 25, 2026 · Assigned by GitHub_M
CVE-2026-25136Rucio WebUI has a Reflected Cross-site Scripting Vulnerability
High 8.1
In plain English
A high-severity cross-site scripting in rucio from rucio. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 24% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official description
Rucio is a software framework that provides functionality to organize, manage, and access large volumes of scientific data using customizable policies. A reflected Cross-site Scripting vulnerability was located in versions prior to 35.8.3, 38.5.4, and 39.3.1 in the rendering of the ExceptionMessage of the WebUI 500 error which could allow attackers to steal login session tokens of users who navigate to a specially crafted URL. Versions 35.8.3, 38.5.4, and 39.3.1 fix the issue.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| PyPI | rucio-webui | 35.8.3 | GHSA-h79m-5jjm-jm4q |
| PyPI | rucio-webui | 38.5.4 | GHSA-h79m-5jjm-jm4q |
| PyPI | rucio-webui | 39.3.1 | GHSA-h79m-5jjm-jm4q |
| PyPI | rucio-webui | 35.8.3, 38.5.4, 39.3.1 | PYSEC-2026-3056 |
Affected products (as reported)
Weakness: CWE-79, CWE-1004 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N
References
- https://github.com/rucio/rucio/security/advisories/GHSA-h79m-5jjm-jm4q x_refsource_CONFIRM
- https://cheatsheetseries.owasp.org/cheatsheets/Cross_Site_Scripting_Prevention_Cheat_Sheet.html x_refsource_MISC
- https://github.com/rucio/rucio/releases/tag/35.8.3 x_refsource_MISC
- https://github.com/rucio/rucio/releases/tag/38.5.4 x_refsource_MISC
- https://github.com/rucio/rucio/releases/tag/39.3.1 x_refsource_MISC