{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-55424",
        "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "state": "PUBLISHED",
        "assignerShortName": "GitHub_M",
        "dateReserved": "2026-06-16T21:48:43.126Z",
        "datePublished": "2026-07-09T22:01:22.249Z",
        "dateUpdated": "2026-07-10T14:40:09.311Z"
    },
    "containers": {
        "cna": {
            "title": "Discourse: Topic featured link susceptible to stored XSS",
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "cweId": "CWE-79",
                            "lang": "en",
                            "description": "CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')",
                            "type": "CWE"
                        }
                    ]
                }
            ],
            "metrics": [
                {
                    "cvssV4_0": {
                        "attackVector": "NETWORK",
                        "attackComplexity": "LOW",
                        "attackRequirements": "PRESENT",
                        "privilegesRequired": "LOW",
                        "userInteraction": "PASSIVE",
                        "vulnConfidentialityImpact": "HIGH",
                        "vulnIntegrityImpact": "HIGH",
                        "vulnAvailabilityImpact": "NONE",
                        "subConfidentialityImpact": "NONE",
                        "subIntegrityImpact": "NONE",
                        "subAvailabilityImpact": "NONE",
                        "baseScore": 7.4,
                        "baseSeverity": "HIGH",
                        "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:P/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N",
                        "version": "4.0"
                    }
                }
            ],
            "references": [
                {
                    "name": "https://github.com/discourse/discourse/security/advisories/GHSA-695w-7fv8-mxg3",
                    "tags": [
                        "x_refsource_CONFIRM"
                    ],
                    "url": "https://github.com/discourse/discourse/security/advisories/GHSA-695w-7fv8-mxg3"
                },
                {
                    "name": "https://github.com/discourse/discourse/commit/1bce8881e4253d9bbab56f011a12ef899b926b59",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/discourse/discourse/commit/1bce8881e4253d9bbab56f011a12ef899b926b59"
                },
                {
                    "name": "https://github.com/discourse/discourse/commit/6679d9a5083488bae10c2adbb345c481c583242c",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/discourse/discourse/commit/6679d9a5083488bae10c2adbb345c481c583242c"
                },
                {
                    "name": "https://github.com/discourse/discourse/commit/6828aee9b15c2655d63b515ac919830bd540ff83",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/discourse/discourse/commit/6828aee9b15c2655d63b515ac919830bd540ff83"
                },
                {
                    "name": "https://github.com/discourse/discourse/commit/c9b9405f5bd0bf0269e505e28e3aad388d7657c5",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/discourse/discourse/commit/c9b9405f5bd0bf0269e505e28e3aad388d7657c5"
                },
                {
                    "name": "https://github.com/discourse/discourse/releases/tag/v2026.1.5",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/discourse/discourse/releases/tag/v2026.1.5"
                },
                {
                    "name": "https://github.com/discourse/discourse/releases/tag/v2026.4.2",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/discourse/discourse/releases/tag/v2026.4.2"
                },
                {
                    "name": "https://github.com/discourse/discourse/releases/tag/v2026.5.1",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/discourse/discourse/releases/tag/v2026.5.1"
                },
                {
                    "name": "https://github.com/discourse/discourse/releases/tag/v2026.6.0",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/discourse/discourse/releases/tag/v2026.6.0"
                }
            ],
            "affected": [
                {
                    "vendor": "discourse",
                    "product": "discourse",
                    "versions": [
                        {
                            "version": ">= 2026.1.0-latest, < 2026.1.5",
                            "status": "affected"
                        },
                        {
                            "version": ">= 2026.4.0-latest, < 2026.4.2",
                            "status": "affected"
                        },
                        {
                            "version": ">= 2026.5.0-latest, < 2026.5.1",
                            "status": "affected"
                        }
                    ]
                }
            ],
            "providerMetadata": {
                "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
                "shortName": "GitHub_M",
                "dateUpdated": "2026-07-09T22:01:22.249Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "Discourse is an open-source discussion platform. Prior to 2026.6.0, 2026.5.1, 2026.4.2, and 2026.1.5, a topic \"featured link\" was not sufficiently normalized and escaped before being rendered in the topic list, allowing a user who can set a featured link to inject JavaScript when default Content Security Policy protections were modified or disabled. This issue is fixed in versions 2026.6.0, 2026.5.1, 2026.4.2, and 2026.1.5."
                }
            ],
            "source": {
                "advisory": "GHSA-695w-7fv8-mxg3",
                "discovery": "UNKNOWN"
            }
        },
        "adp": [
            {
                "metrics": [
                    {
                        "other": {
                            "type": "ssvc",
                            "content": {
                                "timestamp": "2026-07-10T14:39:57.512653Z",
                                "id": "CVE-2026-55424",
                                "options": [
                                    {
                                        "Exploitation": "none"
                                    },
                                    {
                                        "Automatable": "no"
                                    },
                                    {
                                        "Technical Impact": "total"
                                    }
                                ],
                                "role": "CISA Coordinator",
                                "version": "2.0.3"
                            }
                        }
                    }
                ],
                "title": "CISA ADP Vulnrichment",
                "providerMetadata": {
                    "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
                    "shortName": "CISA-ADP",
                    "dateUpdated": "2026-07-10T14:40:09.311Z"
                }
            }
        ]
    }
}