{"api_version":"1","generated_at":"2026-08-31T14:53:30+00:00","cve":"CVE-2026-55248","urls":{"html":"https://cve.report/CVE-2026-55248","api":"https://cve.report/api/cve/CVE-2026-55248.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-55248","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-55248"},"summary":{"title":"plone.app.portlets: Denial of service via RSS feed portlet","description":"plone.app.portlets provides portlets and a Plone-specific user interface for plone.portlets. Prior to 5.0.8, 6.0.4, and 7.0.2, a member who can add an RSS portlet can set its feed URL to a very large response, causing src/plone/app/portlets/portlets/rss.py to download and retain excessive data in memory and deny service. The same RSS URL handling accepts internal hosts, IP addresses, single-word domains, and explicit ports, allowing server-side requests that can probe internal network services and open ports. A malicious feed item can also supply a JavaScript URL that is retained as the item link and can execute script when used by a victim. The affected logic includes _rss_feed_url_validator, _normal_url_validator, RSSFeed._retrieveFeed, RSSFeed._buildItemDict, and the FEED_DATA in-memory cache. 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