How severe is CVE-2026-7186?

CVE-2026-7186 has a CVSS 3.x base score of 5.4, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2026-7186 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (3rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-7186?

CVE-2026-7186 primarily affects Checkmk. In total, 157 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2026-7186?

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

Does CVE-2026-7186 have an EU (EUVD) identifier?

Yes. CVE-2026-7186 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-35061.

When was CVE-2026-7186 published?

CVE-2026-7186 was published on 2026-06-08 and last updated on 2026-06-17.

CVE-2026-7186

CVE-2026-7186 is a medium-severity vulnerability in Checkmk with a CVSS 3.x base score of 5.4. 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: Medium (CVSS 3.x base score 5.4)
CVSS v4: 8.5
EPSS exploit prediction: 0% (3rd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-35061
Weakness: CWE-79
Affected product: Checkmk
Published: 2026-06-08
Last modified: 2026-06-17

Description

Stored cross-site scripting in the URL dashboard widget in Checkmk <2.5.0p5, <2.4.0p31, <2.3.0p48, and all 2.2.0 versions allows a user with dashboard editing permissions to store a URL with a dangerous URI scheme such as javascript: that executes scripts in other users' browsers when they view the dashboard.

Frequently asked questions

What is CVE-2026-7186?: Stored cross-site scripting in the URL dashboard widget in Checkmk <2.5.0p5, <2.4.0p31, <2.3.0p48, and all 2.2.0 versions allows a user with dashboard editing permissions to store a URL with a dangerous URI scheme such as javascript: that executes scripts in other users' browsers when they view the dashboard.
How severe is CVE-2026-7186?: CVE-2026-7186 has a CVSS 3.x base score of 5.4, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2026-7186 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (3rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-7186?: CVE-2026-7186 primarily affects Checkmk. In total, 157 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2026-7186?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-7186 have an EU (EUVD) identifier?: Yes. CVE-2026-7186 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-35061.
When was CVE-2026-7186 published?: CVE-2026-7186 was published on 2026-06-08 and last updated on 2026-06-17.

References

https://checkmk.com/werk/17991

Affected products (157)

cpe:2.3:a:checkmk:checkmk:2.2.0:-:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.2.0:b1:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.2.0:b2:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.2.0:b3:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.2.0:b4:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.2.0:b5:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.2.0:b6:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.2.0:b7:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.2.0:b8:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.2.0:i1:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.2.0:p1:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.2.0:p10:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.2.0:p11:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.2.0:p12:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.2.0:p13:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.2.0:p14:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.2.0:p15:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.2.0:p16:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.2.0:p17:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.2.0:p18:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.2.0:p19:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.2.0:p2:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.2.0:p20:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.2.0:p21:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.2.0:p22:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.2.0:p23:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.2.0:p24:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.2.0:p25:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.2.0:p26:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.2.0:p27:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.2.0:p28:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.2.0:p29:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.2.0:p3:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.2.0:p30:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.2.0:p31:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.2.0:p32:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.2.0:p33:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.2.0:p34:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.2.0:p35:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.2.0:p36:*:*:*:*:*:*

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