How severe is CVE-2026-26000?

CVE-2026-26000 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2026-26000 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (20th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-26000?

CVE-2026-26000 affects Xwiki. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-26000?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-26000 have an EU (EUVD) identifier?

Yes. CVE-2026-26000 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-6694.

When was CVE-2026-26000 published?

CVE-2026-26000 was published on 2026-02-12 and last updated on 2026-06-17.

CVE-2026-26000

CVE-2026-26000 is a medium-severity vulnerability in Xwiki with a CVSS 3.x base score of 6.1. 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-1021.

Key facts

Severity: Medium (CVSS 3.x base score 6.1)
CVSS v4: 5.3
EPSS exploit prediction: 0% (20th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-6694
Weakness: CWE-1021
Affected product: Xwiki
Published: 2026-02-12
Last modified: 2026-06-17

Description

XWiki Platform is a generic wiki platform offering runtime services for applications built on top of it. Prior to 17.9.0, 17.4.6, and 16.10.13, it's possible using comments to inject CSS that would transform the full wiki in a link area leading to a malicious page. This vulnerability is fixed in 17.9.0, 17.4.6, and 16.10.13.

Frequently asked questions

What is CVE-2026-26000?: XWiki Platform is a generic wiki platform offering runtime services for applications built on top of it. Prior to 17.9.0, 17.4.6, and 16.10.13, it's possible using comments to inject CSS that would transform the full wiki in a link area leading to a malicious page. This vulnerability is fixed in 17.9.0, 17.4.6, and 16.10.13.
How severe is CVE-2026-26000?: CVE-2026-26000 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2026-26000 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (20th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-26000?: CVE-2026-26000 affects Xwiki. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-26000?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-26000 have an EU (EUVD) identifier?: Yes. CVE-2026-26000 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-6694.
When was CVE-2026-26000 published?: CVE-2026-26000 was published on 2026-02-12 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:xwiki:xwiki:*:*:*:*:*:*:*:*

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