{"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"}}]}}