Rucio WebUI has a Reflected Cross-site Scripting Vulnerability

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.

Scores

EPSS (exploitation in 30 days)

0.31% · top 76% of all CVEs (6 Nov 2026)

CISA SSVC

Exploitation: poc · Automatable: no · Technical impact: partial

The list uses the assigner's score when there is one, then CISA's, then NVD's: High 8.1.

Weakness

• CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') (opens in a new tab)All about CWE-79 and its CVEs
• CWE-1004: Sensitive Cookie Without 'HttpOnly' Flag (opens in a new tab)All about CWE-1004 and its CVEs

Affected products

• rucio · rucio

  • affected < 35.8.3
  • affected >= 36.0.0rc1, < 38.5.4
  • affected >= 39.0.0rc1, < 39.3.1

Affected packages

From reviewed advisories of the GitHub Advisory Database.

• PyPIrucio-webuiGHSA-h79m-5jjm-jm4q (opens in a new tab)

References (5)

• https://github.com/rucio/rucio/security/advisories/GHSA-h79m-5jjm-jm4q (opens in a new tab)x_refsource_CONFIRM
• https://cheatsheetseries.owasp.org/cheatsheets/Cross_Site_Scripting_Prevention_Cheat_Sheet.html (opens in a new tab)x_refsource_MISC
• https://github.com/rucio/rucio/releases/tag/35.8.3 (opens in a new tab)x_refsource_MISC
• https://github.com/rucio/rucio/releases/tag/38.5.4 (opens in a new tab)x_refsource_MISC
• https://github.com/rucio/rucio/releases/tag/39.3.1 (opens in a new tab)x_refsource_MISC

Sources

The same CVE in the primary databases and aggregators, to check against.

• CVE.org record (opens in a new tab)
• CVE List JSON (GitHub) (opens in a new tab)
• NVD (opens in a new tab)
• FIRST EPSS (opens in a new tab)
• OSV.dev (opens in a new tab)
• GitHub Advisory GHSA-h79m-5jjm-jm4q (opens in a new tab)
• CIRCL Vulnerability-Lookup (opens in a new tab)

Badge for a README or a ticket

[![CVE-2026-25136](https://trackcve.app/badge/CVE-2026-25136.svg)](https://trackcve.app/cve/CVE-2026-25136)

Record last updated 26 Feb 2026, 20:44 UTC.