CVE-2026-3438

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Exploitation requires user interaction.", "supportingMedia": [{"type": "text/html", "value": "A reflected cross-site scripting vulnerability exists in Sonatype Nexus Repository versions 3.0.0 through 3.90.2 that allows unauthenticated remote attackers to execute arbitrary JavaScript in a victim's browser through a specially crafted URL. Exploitation requires user interaction.", "base64": false}]}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-79", "description": "CWE-79 Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting')"}]}], "providerMetadata": {"orgId": "103e4ec9-0a87-450b-af77-479448ddef11", "shortName": "Sonatype", "dateUpdated": "2026-04-08T22:16:09.657Z"}}}, "cveMetadata": {"cveId": "CVE-2026-3438", "state": "PUBLISHED", "dateUpdated": "2026-04-09T13:18:17.962Z", "dateReserved": "2026-03-02T13:11:18.321Z", "assignerOrgId": "103e4ec9-0a87-450b-af77-479448ddef11", "datePublished": "2026-04-08T22:16:09.657Z", "assignerShortName": "Sonatype"}, "dataVersion": "5.2"}

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"versionStartIncluding": "3.0.0", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "A reflected cross-site scripting vulnerability exists in Sonatype Nexus Repository versions 3.0.0 through 3.90.2 that allows unauthenticated remote attackers to execute arbitrary JavaScript in a victim's browser through a specially crafted URL. Exploitation requires user interaction."}, {"lang": "es", "value": "Existe una vulnerabilidad de cross-site scripting reflejado en las versiones de Sonatype Nexus Repository 3.0.0 a la 3.90.2 que permite a atacantes remotos no autenticados ejecutar JavaScript arbitrario en el navegador de una v\u00edctima a trav\u00e9s de una URL especialmente dise\u00f1ada. La explotaci\u00f3n requiere interacci\u00f3n del usuario."}], "id": "CVE-2026-3438", "lastModified": "2026-09-18T15:38:49.823", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 6.1, "baseSeverity": "MEDIUM", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "privilegesRequired": "NONE", "scope": "CHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 2.7, "source": "nvd@nist.gov", "type": "Primary"}], "cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "NONE", "attackVector": "NETWORK", "availabilityRequirement": "NOT_DEFINED", "baseScore": 5.1, "baseSeverity": "MEDIUM", "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": "NONE", "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:N/UI:A/VC:N/VI:N/VA:N/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": "NONE", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "NONE", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "103e4ec9-0a87-450b-af77-479448ddef11", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-3438", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-04-09T13:18:08.006110Z", "version": "2.0.3"}}]}, "published": "2026-04-08T23:16:59.410", "references": [{"source": "103e4ec9-0a87-450b-af77-479448ddef11", "tags": ["Release Notes"], "url": "https://help.sonatype.com/en/sonatype-nexus-repository-3-91-0-release-notes.html"}, {"source": "103e4ec9-0a87-450b-af77-479448ddef11", "tags": ["Vendor Advisory"], "url": "https://support.sonatype.com/hc/en-us/articles/50609137161363"}], "sourceIdentifier": "103e4ec9-0a87-450b-af77-479448ddef11", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-79"}], "source": "103e4ec9-0a87-450b-af77-479448ddef11", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[3.0.0,3.91.0)"}}], "enrichment": {"confidence": 90.0, "confidence_source": "inferred", "scores": [{"score": 90.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Nexus Repository", "source": "cna", "vendor": "Sonatype"}, "product": "nexus_repository_manager", "vendor": "sonatype"}], "analysis": {"en": {"generated_at": "2026-04-08T23:24:52.179586+00:00", "value": {"mitigation_remediation": ["Upgrade Sonatype Nexus Repository to version 3.91.0 or later, where the issue has been fixed.", "If an upgrade is not immediately possible, restrict access to the Nexus web interface or implement network\u2011level controls to block or scrutinize suspicious URLs.", "Ensure browsers perform same\u2011origin policy checks and consider disabling JavaScript for high\u2011risk sites in corporate browsers.", "Verify that the updated Nexus instance no longer reflects the vulnerable endpoint and monitor logs for XSS\u2011related events.", "Keep the system patched and updated as new security advisories are released."], "summary": {"action": "Apply Patch", "impact": "Reflected cross\u2011site scripting allowing arbitrary JavaScript execution"}, "threat_synthesis": {"affected_systems": "The affected product is Sonatype Nexus Repository 3. All versions from 3.0.0 up to and including 3.90.2 are vulnerable. Any deployment that serves the web UI for these versions is at risk unless mitigated or upgraded.", "description_and_impact": "A reflected XSS flaw exists in Sonatype Nexus Repository 3, affecting all releases from 3.0.0 through 3.90.2. An attacker can embed malicious JavaScript into a URL that, when a victim opens the link in a browser, is executed within the context of the Nexus web interface. The flaw originates from insufficient sanitization of user\u2011controlled input in the request path. The impact is the execution of arbitrary client\u2011side code, which could lead to session hijacking, credential theft, or defacement. The weakness is classified as CWE\u201179, a standard cross\u2011site scripting vulnerability.", "risk_and_exploitability": "The CVSS score is 5.1, indicating medium severity. Exploitation requires user interaction, so the attack surface is reduced to users or compromised network paths that can deliver the crafted link. EPSS data is unavailable, and the vulnerability is not listed in CISA's KEV catalog, suggesting it is not currently confirmed as widely exploited. Nonetheless, any user who clicks on a malicious link could be impacted, making the risk moderate for organizations whose web interfaces are exposed to external or internal users."}}}}, "created": "2026-04-09T08:16:18.556898+00:00", "updated": "2026-04-09T08:25:44.615998+00:00", "vendors": ["sonatype", "sonatype$PRODUCT$nexus_repository_manager"]}