{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-126348",
        "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "state": "PUBLISHED",
        "assignerShortName": "GitHub_M",
        "dateReserved": "2026-11-10T21:12:01.227Z",
        "datePublished": "2026-11-12T21:57:55.237Z",
        "dateUpdated": "2026-11-12T21:57:55.237Z"
    },
    "containers": {
        "cna": {
            "title": "Addressable display_uri can show misleading hosts with invalid Punycode A-labels",
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "cweId": "CWE-20",
                            "lang": "en",
                            "description": "CWE-20: Improper Input Validation",
                            "type": "CWE"
                        }
                    ]
                },
                {
                    "descriptions": [
                        {
                            "cweId": "CWE-1007",
                            "lang": "en",
                            "description": "CWE-1007: Insufficient Visual Distinction of Homoglyphs Presented to User",
                            "type": "CWE"
                        }
                    ]
                }
            ],
            "metrics": [
                {
                    "cvssV3_1": {
                        "attackComplexity": "LOW",
                        "attackVector": "NETWORK",
                        "availabilityImpact": "NONE",
                        "baseScore": 4.3,
                        "baseSeverity": "MEDIUM",
                        "confidentialityImpact": "NONE",
                        "integrityImpact": "LOW",
                        "privilegesRequired": "NONE",
                        "scope": "UNCHANGED",
                        "userInteraction": "REQUIRED",
                        "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N",
                        "version": "3.1"
                    }
                }
            ],
            "references": [
                {
                    "name": "https://github.com/sporkmonger/addressable/security/advisories/GHSA-9crm-g4mf-wc5j",
                    "tags": [
                        "x_refsource_CONFIRM"
                    ],
                    "url": "https://github.com/sporkmonger/addressable/security/advisories/GHSA-9crm-g4mf-wc5j"
                },
                {
                    "name": "https://github.com/sporkmonger/addressable/commit/b8a59cc0e03f8704f1d7c8122fc8f7ef8548362d",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/sporkmonger/addressable/commit/b8a59cc0e03f8704f1d7c8122fc8f7ef8548362d"
                },
                {
                    "name": "https://github.com/sporkmonger/addressable/releases/tag/addressable-2.9.1",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/sporkmonger/addressable/releases/tag/addressable-2.9.1"
                }
            ],
            "affected": [
                {
                    "vendor": "sporkmonger",
                    "product": "addressable",
                    "versions": [
                        {
                            "version": ">= 2.0.0, < 2.9.1",
                            "status": "affected"
                        }
                    ]
                }
            ],
            "providerMetadata": {
                "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
                "shortName": "GitHub_M",
                "dateUpdated": "2026-11-12T21:57:55.237Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "Addressable is an alternative implementation to the URI implementation that is part of Ruby's standard library. From 2.0.0 until 2.9.1, the pure-Ruby Addressable::IDNA.to_unicode implementation decodes invalid Punycode A-labels instead of returning them unchanged. Labels that decode to ASCII text or fail to convert back to the same A-label can therefore make Addressable::URI#display_uri show a trusted-looking host while host, normalized_host, and the connection target retain the attacker-controlled encoded host. A trusted-name comparison using Addressable::IDNA.to_unicode output can also treat two different hosts as the same without displaying the URI. The native libidn implementation, to_ascii, and normalized_host are unaffected. This issue is fixed in version 2.9.1."
                }
            ],
            "source": {
                "advisory": "GHSA-9crm-g4mf-wc5j",
                "discovery": "UNKNOWN"
            }
        }
    }
}