CVE-2026-3466 - Vulnerability Details - OpenCVE

Insufficient sanitization of dashboard dashlet title links in Checkmk 2.2.0 (EOL), Checkmk 2.3.0 before 2.3.0p46, Checkmk 2.4.0 before 2.4.0p25, and Checkmk 2.5.0 (beta) before 2.5.0b3 allows an attacker with dashboard creation privileges to perform stored cross-site scripting (XSS) attacks by tricking a victim into clicking a crafted dashlet title link on a shared dashboard.

Attack Vector Network

Attack Complexity Low

Privileges Required Low

Attack Requirements None

User Interaction Active

Vulnerable System Confidentiality Impact High

Vulnerable System Integrity Impact High

Vulnerable System Availability Impact High

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact Low

Subsequent System Availability Impact None

No CVSS v3.1

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Exploitation none

Automatable no

Technical Impact total

Vendors	Products
Checkmk	Checkmk

No data.

No data.

No data.

References

Link	Providers
https://checkmk.com/werk/19033

History

Tue, 07 Apr 2026 15:15:00 +0000

Type	Values Removed	Values Added
Description		Insufficient sanitization of dashboard dashlet title links in Checkmk 2.2.0 (EOL), Checkmk 2.3.0 before 2.3.0p46, Checkmk 2.4.0 before 2.4.0p25, and Checkmk 2.5.0 (beta) before 2.5.0b3 allows an attacker with dashboard creation privileges to perform stored cross-site scripting (XSS) attacks by tricking a victim into clicking a crafted dashlet title link on a shared dashboard.
Title		Cross-site scripting in dashlet title
First Time appeared		Checkmk Checkmk checkmk
Weaknesses		CWE-79
CPEs		cpe:2.3:a:checkmk:checkmk:::::::: cpe:2.3:a:checkmk:checkmk:2.2.0:::::::*
Vendors & Products		Checkmk Checkmk checkmk
References		https://checkmk.com/werk/19033
Metrics		cvssV4_0 `{'score': 8.5, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:H/VI:H/VA:H/SC:N/SI:L/SA:N'}` ssvc `{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}`

MITRE

Status: PUBLISHED

Assigner: Checkmk

Published: 2026-04-07T12:08:50.132Z

Updated: 2026-04-07T13:18:48.034Z

Reserved: 2026-03-03T09:09:01.487Z

Link: CVE-2026-3466

Vulnrichment

Updated: 2026-04-07T13:18:44.039Z

NVD

Status : Awaiting Analysis

Published: 2026-04-07T13:16:47.150

Modified: 2026-04-07T13:20:11.643

Link: CVE-2026-3466

Redhat

No data.

OpenCVE Enrichment

No data.

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-3466", "assignerOrgId": "f7d6281c-4801-44ce-ace2-493291dedb0f", "state": "PUBLISHED", "assignerShortName": "Checkmk", "dateReserved": "2026-03-03T09:09:01.487Z", "datePublished": "2026-04-07T12:08:50.132Z", "dateUpdated": "2026-04-07T13:18:48.034Z"}, "containers": {"cna": {"affected": [{"defaultStatus": "unaffected", "product": "Checkmk", "vendor": "Checkmk GmbH", "versions": [{"status": "affected", "version": "2.2.0", "versionType": "semver"}, {"lessThan": "2.3.0p46", "status": "affected", "version": "2.3.0", "versionType": "semver"}, {"lessThan": "2.4.0p25", "status": "affected", "version": "2.4.0", "versionType": "semver"}, {"lessThan": "2.5.0b3", "status": "affected", "version": "2.5.0b1", "versionType": "semver"}]}], "credits": [{"lang": "en", "type": "reporter", "value": "Alex Williams (Pellera Technologies)"}], "descriptions": [{"lang": "en", "value": "Insufficient sanitization of dashboard dashlet title links in Checkmk 2.2.0 (EOL), Checkmk 2.3.0 before 2.3.0p46, Checkmk 2.4.0 before 2.4.0p25, and Checkmk 2.5.0 (beta) before 2.5.0b3 allows an attacker with dashboard creation privileges to perform stored cross-site scripting (XSS) attacks by tricking a victim into clicking a crafted dashlet title link on a shared dashboard."}], "impacts": [{"capecId": "CAPEC-592", "descriptions": [{"lang": "en", "value": "CAPEC-592: Stored XSS"}]}], "metrics": [{"cvssV4_0": {"baseScore": 8.5, "baseSeverity": "HIGH", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:H/VI:H/VA:H/SC:N/SI:L/SA:N", "version": "4.0"}}], "problemTypes": [{"descriptions": [{"cweId": "CWE-79", "description": "CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')", "lang": "en", "type": "CWE"}]}], "providerMetadata": {"orgId": "f7d6281c-4801-44ce-ace2-493291dedb0f", "shortName": "Checkmk", "dateUpdated": "2026-04-07T12:08:50.132Z"}, "references": [{"url": "https://checkmk.com/werk/19033", "tags": ["vendor-advisory"]}], "title": "Cross-site scripting in dashlet title", "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:checkmk:checkmk:2.2.0:*:*:*:*:*:*:*"}, {"vulnerable": true, "criteria": "cpe:2.3:a:checkmk:checkmk:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.3.0", "versionEndExcluding": "2.3.0p46"}, {"vulnerable": true, "criteria": "cpe:2.3:a:checkmk:checkmk:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.4.0", "versionEndExcluding": "2.4.0p25"}, {"vulnerable": true, "criteria": "cpe:2.3:a:checkmk:checkmk:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.5.0b1", "versionEndExcluding": "2.5.0b3"}]}]}], "x_generator": {"engine": "cvelib 1.8.0"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-04-07T13:18:39.707466Z", "id": "CVE-2026-3466", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "total"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-04-07T13:18:48.034Z"}}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-3466", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "total"}], "version": "2.0.3", "timestamp": "2026-04-07T13:18:39.707466Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-04-07T13:18:44.039Z"}}], "cna": {"title": "Cross-site scripting in dashlet title", "credits": [{"lang": "en", "type": "reporter", "value": "Alex Williams (Pellera Technologies)"}], "impacts": [{"capecId": "CAPEC-592", "descriptions": [{"lang": "en", "value": "CAPEC-592: Stored XSS"}]}], "metrics": [{"cvssV4_0": {"version": "4.0", "baseScore": 8.5, "baseSeverity": "HIGH", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:H/VI:H/VA:H/SC:N/SI:L/SA:N"}}], "affected": [{"vendor": "Checkmk GmbH", "product": "Checkmk", "versions": [{"status": "affected", "version": "2.2.0", "versionType": "semver"}, {"status": "affected", "version": "2.3.0", "lessThan": "2.3.0p46", "versionType": "semver"}, {"status": "affected", "version": "2.4.0", "lessThan": "2.4.0p25", "versionType": "semver"}, {"status": "affected", "version": "2.5.0b1", "lessThan": "2.5.0b3", "versionType": "semver"}], "defaultStatus": "unaffected"}], "references": [{"url": "https://checkmk.com/werk/19033", "tags": ["vendor-advisory"]}], "x_generator": {"engine": "cvelib 1.8.0"}, "descriptions": [{"lang": "en", "value": "Insufficient sanitization of dashboard dashlet title links in Checkmk 2.2.0 (EOL), Checkmk 2.3.0 before 2.3.0p46, Checkmk 2.4.0 before 2.4.0p25, and Checkmk 2.5.0 (beta) before 2.5.0b3 allows an attacker with dashboard creation privileges to perform stored cross-site scripting (XSS) attacks by tricking a victim into clicking a crafted dashlet title link on a shared dashboard."}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-79", "description": "CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')"}]}], "cpeApplicability": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:checkmk:checkmk:2.2.0:*:*:*:*:*:*:*", "vulnerable": true}, {"criteria": "cpe:2.3:a:checkmk:checkmk:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "2.3.0p46", "versionStartIncluding": "2.3.0"}, {"criteria": "cpe:2.3:a:checkmk:checkmk:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "2.4.0p25", "versionStartIncluding": "2.4.0"}, {"criteria": "cpe:2.3:a:checkmk:checkmk:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "2.5.0b3", "versionStartIncluding": "2.5.0b1"}], "operator": "OR"}]}], "providerMetadata": {"orgId": "f7d6281c-4801-44ce-ace2-493291dedb0f", "shortName": "Checkmk", "dateUpdated": "2026-04-07T12:08:50.132Z"}}}, "cveMetadata": {"cveId": "CVE-2026-3466", "state": "PUBLISHED", "dateUpdated": "2026-04-07T13:18:48.034Z", "dateReserved": "2026-03-03T09:09:01.487Z", "assignerOrgId": "f7d6281c-4801-44ce-ace2-493291dedb0f", "datePublished": "2026-04-07T12:08:50.132Z", "assignerShortName": "Checkmk"}, "dataVersion": "5.2"}

{"cveTags": [], "descriptions": [{"lang": "en", "value": "Insufficient sanitization of dashboard dashlet title links in Checkmk 2.2.0 (EOL), Checkmk 2.3.0 before 2.3.0p46, Checkmk 2.4.0 before 2.4.0p25, and Checkmk 2.5.0 (beta) before 2.5.0b3 allows an attacker with dashboard creation privileges to perform stored cross-site scripting (XSS) attacks by tricking a victim into clicking a crafted dashlet title link on a shared dashboard."}], "id": "CVE-2026-3466", "lastModified": "2026-04-07T13:20:11.643", "metrics": {"cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "NONE", "attackVector": "NETWORK", "availabilityRequirement": "NOT_DEFINED", "baseScore": 8.5, "baseSeverity": "HIGH", "confidentialityRequirement": "NOT_DEFINED", "exploitMaturity": "NOT_DEFINED", "integrityRequirement": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "privilegesRequired": "LOW", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "LOW", "userInteraction": "ACTIVE", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:H/VI:H/VA:H/SC:N/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X", "version": "4.0", "vulnAvailabilityImpact": "HIGH", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "HIGH", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "security@checkmk.com", "type": "Secondary"}]}, "published": "2026-04-07T13:16:47.150", "references": [{"source": "security@checkmk.com", "url": "https://checkmk.com/werk/19033"}], "sourceIdentifier": "security@checkmk.com", "vulnStatus": "Awaiting Analysis", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-79"}], "source": "security@checkmk.com", "type": "Secondary"}]}