CVE-2026-25136

Rucio WebUI has a Reflected Cross-site Scripting Vulnerability

MEDIUM
6.1
CVSS Score
Published: February 25, 2026 at 06:57 PM UTC
Updated: June 17, 2026 at 10:24 AM UTC
2 products affected across 2 vendorsRucioRucio

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Severity
MEDIUM6.1
Exploit prediction
EPSS 0.3%
SSVC
PoC

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

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

v < 35.8.336.0.0 ≤ v < 38.5.439.0.0 ≤ v < 39.3.1
v < 35.8.3v < 38.5.4v < 39.3.1
Affected range stops below 35.8.3, so it looks safe — our inference, not a vendor statement
Affected range stops below 38.5.4, so it looks safe — our inference, not a vendor statement
Affected range stops below 39.3.1, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

References (5)

x_refsource_CONFIRMExploitVendor Advisory
Source: cverecord
https://github.com/rucio/rucio/security/advisories/GHSA-h79m-5jjm-jm4q
x_refsource_MISCProductRelease Notes
Source: cverecord
https://github.com/rucio/rucio/releases/tag/35.8.3
x_refsource_MISCProductRelease Notes
Source: cverecord
https://github.com/rucio/rucio/releases/tag/38.5.4
x_refsource_MISCProductRelease Notes
Source: cverecord
https://github.com/rucio/rucio/releases/tag/39.3.1

SSVC — Action Prioritization

SSVCPoCNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality
LOW
Integrity
LOW
Availability
NONE
Vector?

Quick Info

StatusANALYZED
CWE
CWE-79CWE-1004

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