{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-27645","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","state":"PUBLISHED","assignerShortName":"GitHub_M","dateReserved":"2026-02-20T22:02:30.029Z","datePublished":"2026-02-25T04:06:58.183Z","dateUpdated":"2026-02-25T14:55:58.413Z"},"containers":{"cna":{"title":"changedetection.io Vulnerable to Reflected XSS in RSS Single Watch Error Response","problemTypes":[{"descriptions":[{"cweId":"CWE-79","lang":"en","description":"CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')","type":"CWE"}]}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":6.1,"baseSeverity":"MEDIUM","confidentialityImpact":"LOW","integrityImpact":"LOW","privilegesRequired":"NONE","scope":"CHANGED","userInteraction":"REQUIRED","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","version":"3.1"}}],"references":[{"name":"https://github.com/dgtlmoon/changedetection.io/security/advisories/GHSA-mw8m-398g-h89w","tags":["x_refsource_CONFIRM"],"url":"https://github.com/dgtlmoon/changedetection.io/security/advisories/GHSA-mw8m-398g-h89w"},{"name":"https://github.com/dgtlmoon/changedetection.io/commit/a385c89abf44b52fcfa20c7c6a6dd3047c4c1eb5","tags":["x_refsource_MISC"],"url":"https://github.com/dgtlmoon/changedetection.io/commit/a385c89abf44b52fcfa20c7c6a6dd3047c4c1eb5"}],"affected":[{"vendor":"dgtlmoon","product":"changedetection.io","versions":[{"version":"< 0.54.1","status":"affected"}]}],"providerMetadata":{"orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","shortName":"GitHub_M","dateUpdated":"2026-02-25T04:06:58.183Z"},"descriptions":[{"lang":"en","value":"changedetection.io is a free open source web page change detection tool. In versions prior to 0.54.1, the RSS single-watch endpoint reflects the UUID path parameter directly in the HTTP response body without HTML escaping. Since Flask returns text/html by default for plain string responses, the browser parses and executes injected JavaScript. Version 0.54.1 contains a fix for the issue."}],"source":{"advisory":"GHSA-mw8m-398g-h89w","discovery":"UNKNOWN"}},"adp":[{"references":[{"url":"https://github.com/dgtlmoon/changedetection.io/security/advisories/GHSA-mw8m-398g-h89w","tags":["exploit"]}],"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-02-25T14:55:52.211770Z","id":"CVE-2026-27645","options":[{"Exploitation":"poc"},{"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":"2026-02-25T14:55:58.413Z"}}]}}