CVE-2026-84673

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{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Jenkins Customizable Header Plugin", "vendor": "Jenkins Project", "versions": [{"lessThanOrEqual": "295.v2544b_ca_19b_97", "status": "affected", "version": "0", "versionType": "maven"}]}], "source": "jenkinsci-cert@googlegroups.com"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Jenkins Customizable Header Plugin 295.v2544b_ca_19b_97 and earlier allows overwriting the plugin's appearance configuration through Stapler data binding, allowing attackers to configure a custom SVG icon containing inline JavaScript, resulting in a stored cross-site scripting (XSS) vulnerability."}], "id": "CVE-2026-84673", "lastModified": "2026-09-03T17:13:16.490", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 8.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 5.9, "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-84673", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-09-02T16:54:44.826509Z", "version": "2.0.3"}}]}, "published": "2026-09-02T16:17:31.940", "references": [{"source": "jenkinsci-cert@googlegroups.com", "url": "https://www.jenkins.io/security/advisory/2026-09-02/#SECURITY-4104"}], "sourceIdentifier": "jenkinsci-cert@googlegroups.com", "vulnStatus": "Awaiting Analysis", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-79"}], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[0,295.v2544b_ca_19b_97]"}}], "enrichment": {"confidence": 100.0, "confidence_source": "cna", "scores": [{"score": 100.0, "source": "cna"}]}, "product": "jenkins_customizable_header_plugin", "vendor": "jenkins_project"}], "created": "2026-09-03T11:30:03.601539+00:00", "title": "Stored XSS via Plugin Configuration Injection in Jenkins Customizable Header Plugin", "updated": "2026-09-03T16:26:54.194744+00:00", "vendors": ["jenkins_project", "jenkins_project$PRODUCT$jenkins_customizable_header_plugin"]}