{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-67338", "assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10", "state": "PUBLISHED", "assignerShortName": "VulnCheck", "dateReserved": "2026-07-29T13:09:45.992Z", "datePublished": "2026-08-01T12:22:17.437Z", "dateUpdated": "2026-08-01T12:22:17.437Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10", "shortName": "VulnCheck", "dateUpdated": "2026-08-01T12:22:17.437Z"}, "datePublic": "2026-06-18T00:00:00.000Z", "title": "JupyterLab before 4.5.9 Stored XSS via Extension Manager", "descriptions": [{"lang": "en", "value": "JupyterLab before 4.5.9 contains a stored cross-site scripting vulnerability in the Extension Manager that fails to validate URI protocols in package metadata URLs. Attackers can publish malicious PyPI packages with javascript: URLs in project metadata that execute arbitrary JavaScript in the JupyterLab origin when users click the extension name."}], "problemTypes": [{"descriptions": [{"lang": "en", "description": "Improper Neutralization of Encoded URI Schemes in a Web Page", "cweId": "CWE-84", "type": "CWE"}]}], "affected": [{"vendor": "jupyterlab", "product": "jupyterlab", "defaultStatus": "unaffected", "versions": [{"version": "0", "status": "affected", "versionType": "semver", "lessThan": "4.5.9"}, {"version": "4.5.9", "status": "unaffected", "versionType": "semver"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:jupyter:jupyterlab:*:*:*:*:*:*:*:*", "versionEndExcluding": "4.5.9"}]}]}], "metrics": [{"cvssV4_0": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "NONE", "attackVector": "NETWORK", "baseScore": 5.1, "baseSeverity": "MEDIUM", "exploitMaturity": "NOT_DEFINED", "privilegesRequired": "LOW", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "subConfidentialityImpact": "LOW", "subIntegrityImpact": "LOW", "userInteraction": "PASSIVE", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N", "version": "4.0", "vulnAvailabilityImpact": "NONE", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "NONE", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "format": "CVSS"}, {"cvssV3_1": {"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"}, "format": "CVSS"}], "references": [{"url": "https://github.com/jupyterlab/jupyterlab/security/advisories/GHSA-vmhf-c436-hxj4", "tags": ["vendor-advisory"], "name": "GitHub Security Advisory (GHSA-vmhf-c436-hxj4)"}, {"url": "https://github.com/jupyterlab/jupyterlab/commit/4e61e07d0a91145b53fbf96ac74b0387f6bc51f6", "tags": ["patch"], "name": "Patch Commit"}, {"url": "https://github.com/jupyterlab/jupyterlab/commit/d5d961f6e10a6442dddbf94d9a976b3897055a12", "tags": ["patch"], "name": "Patch Commit"}, {"name": "VulnCheck Advisory: JupyterLab before 4.5.9 Stored XSS via Extension Manager", "tags": ["third-party-advisory"], "url": "https://www.vulncheck.com/advisories/jupyterlab-before-stored-xss-via-extension-manager"}], "credits": [{"lang": "en", "value": "krassowski", "type": "reporter"}, {"lang": "en", "value": "Yann-P", "type": "finder"}], "x_generator": {"engine": "vulncheck-endgame"}}}}

{}

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{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,4.5.9)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "4.5.9"}}], "enrichment": {"confidence": 95.0, "confidence_source": "inferred", "scores": [{"score": 95.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "jupyterlab", "source": "cna", "vendor": "jupyterlab"}, "product": "jupyterlab", "vendor": "jupyter"}], "created": "2026-08-01T15:00:06.621108+00:00", "updated": "2026-08-01T15:00:06.621135+00:00", "vendors": ["jupyter", "jupyter$PRODUCT$jupyterlab"]}