How severe is CVE-2026-25136?

CVE-2026-25136 has a CVSS 3.x base score of 8.1, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability none.

Is CVE-2026-25136 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (18th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-25136?

CVE-2026-25136 affects Cern Rucio. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-25136?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2026-25136 have an EU (EUVD) identifier?

Yes. CVE-2026-25136 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-8711.

When was CVE-2026-25136 published?

CVE-2026-25136 was published on 2026-02-25 and last updated on 2026-06-17.

CVE-2026-25136

CVE-2026-25136 is a high-severity vulnerability in Cern Rucio with a CVSS 3.x base score of 8.1. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-79.

Key facts

Severity: High (CVSS 3.x base score 8.1)
EPSS exploit prediction: 0% (18th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-8711
Weakness: CWE-79
Affected product: Cern Rucio
Published: 2026-02-25
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2026-25136?: 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.
How severe is CVE-2026-25136?: CVE-2026-25136 has a CVSS 3.x base score of 8.1, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability none.
Is CVE-2026-25136 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (18th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-25136?: CVE-2026-25136 affects Cern Rucio. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-25136?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2026-25136 have an EU (EUVD) identifier?: Yes. CVE-2026-25136 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-8711.
When was CVE-2026-25136 published?: CVE-2026-25136 was published on 2026-02-25 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:cern:rucio:*:*:*:*:*:*:*:*

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