{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-46644", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-05-15T20:11:54.584Z", "datePublished": "2026-07-14T20:48:31.771Z", "dateUpdated": "2026-07-14T20:48:31.771Z"}, "containers": {"cna": {"title": "symfony/polyfill-intl-idn accepts xn-- labels whose Punycode payload decodes to ASCII-only: insecure equivalence", "problemTypes": [{"descriptions": [{"cweId": "CWE-1289", "lang": "en", "description": "CWE-1289: Improper Validation of Unsafe Equivalence in Input", "type": "CWE"}]}], "metrics": [{"cvssV4_0": {"attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "NONE", "userInteraction": "NONE", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "LOW", "vulnAvailabilityImpact": "NONE", "subConfidentialityImpact": "LOW", "subIntegrityImpact": "LOW", "subAvailabilityImpact": "NONE", "baseScore": 6.9, "baseSeverity": "MEDIUM", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:L/SI:L/SA:N", "version": "4.0"}}], "references": [{"name": "https://github.com/symfony/polyfill/security/advisories/GHSA-2xf4-cg6j-vhgq", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/symfony/polyfill/security/advisories/GHSA-2xf4-cg6j-vhgq"}, {"name": "https://github.com/symfony/polyfill/commit/1be936e2491ccebe152bd736dfc91eb1422c8bec", "tags": ["x_refsource_MISC"], "url": "https://github.com/symfony/polyfill/commit/1be936e2491ccebe152bd736dfc91eb1422c8bec"}, {"name": "https://github.com/symfony/polyfill/releases/tag/v1.38.1", "tags": ["x_refsource_MISC"], "url": "https://github.com/symfony/polyfill/releases/tag/v1.38.1"}], "affected": [{"vendor": "symfony", "product": "polyfill", "versions": [{"version": ">= 1.17.1, < 1.38.1", "status": "affected"}]}, {"vendor": "symfony", "product": "polyfill-intl-idn", "versions": [{"version": ">= 1.17.1, < 1.38.1", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-07-14T20:48:31.771Z"}, "descriptions": [{"lang": "en", "value": "Symfony Polyfill backports PHP features and provides compatibility layers for extensions and functions. From 1.17.1 until 1.38.1, symfony/polyfill-intl-idn accepts xn-- labels whose Punycode payload is empty or decodes to ASCII-only code points because Idn::process() does not enforce the UTS #46 revision 33 requirement that decoded ACE labels contain at least one non-ASCII code point. Originally unequal domain names can be regarded as equal, which can lead to blacklist bypassing, inconsistent URL parsing, and server-side request forgery in applications using the polyfill to canonicalise or compare hostnames. This issue is fixed in version 1.38.1."}], "source": {"advisory": "GHSA-2xf4-cg6j-vhgq", "discovery": "UNKNOWN"}}}}

{}

{}

{}

{}