CVE-2026-40590

{"id": "CVE-2026-40590", "cveTags": [], "metrics": {"cvssMetricV31": [{"type": "Secondary", "source": "security-advisories@github.com", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 4.3, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N", "integrityImpact": "LOW", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "LOW", "confidentialityImpact": "NONE"}, "impactScore": 1.4, "exploitabilityScore": 2.8}]}, "published": "2026-04-21T17:16:56.803", "references": [{"url": "https://github.com/freescout-help-desk/freescout/commit/b3d7611e6e173ed8a5e525b791deb6b32cf1ce62", "source": "security-advisories@github.com"}, {"url": "https://github.com/freescout-help-desk/freescout/releases/tag/1.8.214", "source": "security-advisories@github.com"}, {"url": "https://github.com/freescout-help-desk/freescout/security/advisories/GHSA-wjw4-8xg6-342m", "source": "security-advisories@github.com"}, {"url": "https://github.com/freescout-help-desk/freescout/security/advisories/GHSA-wjw4-8xg6-342m", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"}], "vulnStatus": "Deferred", "weaknesses": [{"type": "Secondary", "source": "security-advisories@github.com", "description": [{"lang": "en", "value": "CWE-639"}]}], "descriptions": [{"lang": "en", "value": "FreeScout is a free self-hosted help desk and shared mailbox. Prior to version 1.8.214, the Change Customer modal exposes a \u201cCreate a new customer\u201d flow via POST /customers/ajax with action=create. Under limited visibility, the endpoint drops unique-email validation. If the supplied email already belongs to a hidden customer, Customer::create() reuses that hidden customer object and fills empty profile fields from attacker-controlled input. Version 1.8.214 fixes the vulnerability."}], "lastModified": "2026-04-22T21:10:14.290", "sourceIdentifier": "security-advisories@github.com"}