CVE-2026-106550

{"id": "CVE-2026-106550", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-106550", "role": "CISA Coordinator", "options": [{"exploitation": "none"}, {"automatable": "yes"}, {"technicalImpact": "partial"}], "version": "2.0.3", "timestamp": "2026-10-07T15:05:14.037126Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.5, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "NONE"}, "impactScore": 3.6, "exploitabilityScore": 3.9}]}, "affected": [{"source": "cret@cert.org", "affectedData": [{"vendor": "Mozilla", "product": "Node-convict", "versions": [{"status": "affected", "version": "6.2.2"}]}]}], "published": "2026-10-06T21:17:18.810", "references": [{"url": "https://github.com/mozilla/node-convict", "source": "cret@cert.org"}, {"url": "https://github.com/tomasilluminati/security-research/blob/main/CVE-2026-106550/README.md", "source": "cret@cert.org"}], "vulnStatus": "Deferred", "weaknesses": [{"type": "Secondary", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "description": [{"lang": "en", "value": "CWE-400"}, {"lang": "en", "value": "CWE-915"}, {"lang": "en", "value": "CWE-1321"}]}], "descriptions": [{"lang": "en", "value": "Mozilla's Node-convict (version 6.2.2 and later) is vulnerable to a Denial of Service vulnerability caused by incomplete prototype\u2011pollution protections in config.set(). An attacker controlling the configuration key can write arbitrary properties to constructor.<key>, which walk() resolves to the global Object function. This allows overwriting core JavaScript methods such as Object.assign, leading to persistent process-wide failures and requiring a restart. The issue bypasses existing filters that only block constructor.prototype.* and __proto__.*. Exploitation requires an endpoint that forwards attacker-controlled keys into config.set()."}], "lastModified": "2026-10-07T20:17:10.790", "sourceIdentifier": "cret@cert.org"}