CVE-2026-44312

{"id": "CVE-2026-44312", "cveTags": [], "metrics": {"cvssMetricV31": [{"type": "Secondary", "source": "security-advisories@github.com", "cvssData": {"scope": "CHANGED", "version": "3.1", "baseScore": 5.8, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N", "integrityImpact": "LOW", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "NONE", "confidentialityImpact": "NONE"}, "impactScore": 1.4, "exploitabilityScore": 3.9}]}, "published": "2026-05-14T17:16:22.393", "references": [{"url": "https://github.com/premailer/css_parser/commit/35e689c904225add78e0c488cf04bad052666449", "source": "security-advisories@github.com"}, {"url": "https://github.com/premailer/css_parser/commit/e0c95d5abe91b237becb90ff316531a6547ada18", "source": "security-advisories@github.com"}, {"url": "https://github.com/premailer/css_parser/issues/185", "source": "security-advisories@github.com"}, {"url": "https://github.com/premailer/css_parser/security/advisories/GHSA-ff6c-w6qf-7xqc", "source": "security-advisories@github.com"}, {"url": "https://github.com/premailer/css_parser/security/advisories/GHSA-ff6c-w6qf-7xqc", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"}], "vulnStatus": "Deferred", "weaknesses": [{"type": "Secondary", "source": "security-advisories@github.com", "description": [{"lang": "en", "value": "CWE-295"}, {"lang": "en", "value": "CWE-829"}]}], "descriptions": [{"lang": "en", "value": "css_parser is a Ruby CSS parser. Prior to 2.1.0 and 1.22.0, the CSS Parser gem does not validate HTTPS connections, allowing a Man-in-the-Middle (MITM) attacker to inject or modify CSS content when stylesheets are loaded via HTTPS. The connection is established with OpenSSL::SSL::VERIFY_NONE, meaning any HTTPS certificate\u2014even entirely untrusted\u2014will be accepted without validation. This vulnerability is fixed in 2.1.0 and 1.22.0."}], "lastModified": "2026-05-15T19:16:59.240", "sourceIdentifier": "security-advisories@github.com"}