{
    "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": "2026-07-15T12:52:31.603Z"
    },
    "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"
            }
        },
        "adp": [
            {
                "metrics": [
                    {
                        "other": {
                            "type": "ssvc",
                            "content": {
                                "timestamp": "2026-07-15T12:52:21.173743Z",
                                "id": "CVE-2026-46644",
                                "options": [
                                    {
                                        "Exploitation": "none"
                                    },
                                    {
                                        "Automatable": "yes"
                                    },
                                    {
                                        "Technical Impact": "partial"
                                    }
                                ],
                                "role": "CISA Coordinator",
                                "version": "2.0.3"
                            }
                        }
                    }
                ],
                "title": "CISA ADP Vulnrichment",
                "providerMetadata": {
                    "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
                    "shortName": "CISA-ADP",
                    "dateUpdated": "2026-07-15T12:52:31.603Z"
                }
            }
        ]
    }
}