{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-27902",
        "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "state": "PUBLISHED",
        "assignerShortName": "GitHub_M",
        "dateReserved": "2026-02-24T15:19:29.718Z",
        "datePublished": "2026-02-26T00:58:54.604Z",
        "dateUpdated": "2026-02-26T18:51:39.142Z"
    },
    "containers": {
        "cna": {
            "title": "Svelte Vulnerable to XSS via HTML Comment Injection in SSR Error Boundary Hydration Markers",
            "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": "HIGH",
                        "attackRequirements": "PRESENT",
                        "privilegesRequired": "NONE",
                        "userInteraction": "PASSIVE",
                        "vulnConfidentialityImpact": "LOW",
                        "vulnIntegrityImpact": "NONE",
                        "vulnAvailabilityImpact": "NONE",
                        "subConfidentialityImpact": "HIGH",
                        "subIntegrityImpact": "HIGH",
                        "subAvailabilityImpact": "NONE",
                        "baseScore": 5.3,
                        "baseSeverity": "MEDIUM",
                        "vectorString": "CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:P/VC:L/VI:N/VA:N/SC:H/SI:H/SA:N",
                        "version": "4.0"
                    }
                }
            ],
            "references": [
                {
                    "name": "https://github.com/sveltejs/svelte/security/advisories/GHSA-qgvg-pr8v-6rr3",
                    "tags": [
                        "x_refsource_CONFIRM"
                    ],
                    "url": "https://github.com/sveltejs/svelte/security/advisories/GHSA-qgvg-pr8v-6rr3"
                },
                {
                    "name": "https://github.com/sveltejs/svelte/commit/0298e979371bb583855c9810db79a70a551d22b9",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/sveltejs/svelte/commit/0298e979371bb583855c9810db79a70a551d22b9"
                },
                {
                    "name": "https://github.com/sveltejs/svelte/releases/tag/svelte%405.53.5",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/sveltejs/svelte/releases/tag/svelte%405.53.5"
                }
            ],
            "affected": [
                {
                    "vendor": "sveltejs",
                    "product": "svelte",
                    "versions": [
                        {
                            "version": ">= 5.53.0, < 5.53.5",
                            "status": "affected"
                        }
                    ]
                }
            ],
            "providerMetadata": {
                "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
                "shortName": "GitHub_M",
                "dateUpdated": "2026-02-26T00:58:54.604Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "Svelte performance oriented web framework. Prior to version 5.53.5, errors from `transformError` were not correctly escaped prior to being embedded in the HTML output, causing potential HTML injection and XSS if attacker-controlled content is returned from `transformError`. Version 5.53.5 fixes the issue."
                }
            ],
            "source": {
                "advisory": "GHSA-qgvg-pr8v-6rr3",
                "discovery": "UNKNOWN"
            }
        },
        "adp": [
            {
                "metrics": [
                    {
                        "other": {
                            "type": "ssvc",
                            "content": {
                                "timestamp": "2026-02-26T18:51:28.889254Z",
                                "id": "CVE-2026-27902",
                                "options": [
                                    {
                                        "Exploitation": "none"
                                    },
                                    {
                                        "Automatable": "no"
                                    },
                                    {
                                        "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": "2026-02-26T18:51:39.142Z"
                }
            }
        ]
    }
}