{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-66824", "assignerOrgId": "5a6e4751-2f3f-4070-9419-94fb35b644e8", "state": "PUBLISHED", "assignerShortName": "CIRCL", "dateReserved": "2026-07-27T19:56:54.970Z", "datePublished": "2026-07-27T19:58:28.248Z", "dateUpdated": "2026-07-27T19:58:28.248Z"}, "containers": {"cna": {"affected": [{"defaultStatus": "unaffected", "product": "lookyloo", "repo": "https://github.com/Lookyloo/lookyloo/", "vendor": "lookyloo", "versions": [{"lessThanOrEqual": "1.40.0", "status": "affected", "version": "0", "versionType": "semver"}]}], "credits": [{"lang": "en", "type": "remediation developer", "value": "Raphael Vinot"}, {"lang": "en", "type": "finder", "value": "Jeroen Pinoy"}], "descriptions": [{"lang": "en", "supportingMedia": [{"base64": false, "type": "text/html", "value": "<p>A stored cross-site scripting vulnerability existed in the capture tree visualization page. The application embedded the serialized capture tree directly into an inline JavaScript block using the Jinja <code>safe</code> filter.</p><p>Because the tree data can contain values derived from captured and potentially attacker-controlled web content, a specially crafted value could prematurely terminate the surrounding <code>&lt;script&gt;</code> element and inject arbitrary HTML or JavaScript. The malicious code would execute in the browser of a user viewing the affected capture tree.</p><p>Successful exploitation could allow an attacker to perform actions using the victim\u2019s authenticated session, access information available to the victim, or modify application data within the permissions of the affected user.</p><p>The patch removes the JSON data from the HTML document and retrieves it through a dedicated API endpoint. The client then processes the response using <code>response.json()</code>, preventing capture data from being interpreted as executable content within the original page\u2019s HTML or JavaScript context.</p>"}], "value": "A stored cross-site scripting vulnerability existed in the capture tree visualization page. The application embedded the serialized capture tree directly into an inline JavaScript block using the Jinja safe filter.\n\nBecause the tree data can contain values derived from captured and potentially attacker-controlled web content, a specially crafted value could prematurely terminate the surrounding <script> element and inject arbitrary HTML or JavaScript. The malicious code would execute in the browser of a user viewing the affected capture tree.\n\nSuccessful exploitation could allow an attacker to perform actions using the victim\u2019s authenticated session, access information available to the victim, or modify application data within the permissions of the affected user.\n\nThe patch removes the JSON data from the HTML document and retrieves it through a dedicated API endpoint. The client then processes the response using response.json(), preventing capture data from being interpreted as executable content within the original page\u2019s HTML or JavaScript context."}], "impacts": [{"capecId": "CAPEC-592", "descriptions": [{"lang": "en", "value": "CAPEC-592 Stored XSS"}]}], "metrics": [{"cvssV4_0": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "NONE", "attackVector": "NETWORK", "baseScore": 9.2, "baseSeverity": "CRITICAL", "privilegesRequired": "NONE", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "subConfidentialityImpact": "HIGH", "subIntegrityImpact": "NONE", "userInteraction": "ACTIVE", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:N/SC:H/SI:N/SA:N", "version": "4.0", "vulnAvailabilityImpact": "NONE", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "HIGH", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}]}], "problemTypes": [{"descriptions": [{"cweId": "CWE-79", "description": "CWE-79 Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting')", "lang": "en", "type": "CWE"}]}], "providerMetadata": {"orgId": "5a6e4751-2f3f-4070-9419-94fb35b644e8", "shortName": "CIRCL", "dateUpdated": "2026-07-27T19:58:28.248Z"}, "references": [{"tags": ["patch"], "url": "https://github.com/Lookyloo/lookyloo/commit/395187b57322ab311363ccc290c010b180389009"}], "source": {"discovery": "UNKNOWN"}, "title": "Stored Cross-Site Scripting via Unsafe Capture Tree JSON Embedding", "x_generator": {"engine": "Vulnogram 0.2.0"}}}}

{}

{}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,1.40.0]"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "lookyloo", "source": "cna", "vendor": "lookyloo"}, "product": "lookyloo", "vendor": "lookyloo"}], "created": "2026-07-28T04:00:06.382186+00:00", "updated": "2026-07-28T04:00:06.382204+00:00", "vendors": ["lookyloo", "lookyloo$PRODUCT$lookyloo"]}