{"cve":{"cve_id":"CVE-2026-13601","is_kev":false,"kev_date_added":null,"kev_vendor_project":null,"kev_product":null,"kev_vulnerability_name":null,"kev_short_description":null,"kev_required_action":null,"kev_due_date":null,"kev_known_ransomware":null,"kev_notes":null,"kev_cwes":null,"epss_score":0.00179,"epss_percentile":0.07501,"epss_as_of":"2026-08-26","description":"A flaw was found in Yelp due to an overly permissive Content Security Policy (CSP) implementation provided by yelp-xsl. A malicious Flatpak application can open crafted help content through the OpenURI portal. By embedding an untrusted CSS stylesheet within a structured SVG document, attacker-controlled content can bypass Flatpak's intended sandbox isolation, allowing Yelp to evaluate local XML inclusions and disclose arbitrary user-readable host files through remote CSS resource requests. 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information.","published_at":"2026-06-29T09:20:40.865000Z","last_modified_at":"2026-08-20T13:16:55.720000Z","cvss_v3_score":7.1,"cvss_v3_vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N","cvss_v3_severity":"HIGH","cvss_v4_score":null,"cvss_v4_vector":null,"cvss_v4_severity":null,"ssvc_decision":null,"ssvc_exploitation":"none","ssvc_automatable":false,"ssvc_technical_impact":"partial","cwes":["CWE-693"],"nvd_references":["https://access.redhat.com/errata/RHSA-2026:47177","https://access.redhat.com/errata/RHSA-2026:47178","https://access.redhat.com/errata/RHSA-2026:54539","https://access.redhat.com/errata/RHSA-2026:54540","https://access.redhat.com/errata/RHSA-2026:54605","https://access.redhat.com/errata/RHSA-2026:54624","https://access.redhat.com/errata/RHSA-2026:54637","https://access.redhat.com/errata/RHSA-2026:54666","https://access.redhat.com/errata/RHSA-2026:57417","https://access.redhat.com/security/cve/CVE-2026-13601","https://blogs.gnome.org/mcatanzaro/2026/05/11/flatpak-sandbox-escape-via-yelp/","https://bugzilla.redhat.com/show_bug.cgi?id=2494110","https://gitlab.gnome.org/GNOME/yelp/-/commit/c8c8244c8a812860782d635890c9b6c43ecc2639","https://gitlab.gnome.org/GNOME/yelp/-/work_items/238"],"vuln_status":"Modified","trending_score":null,"is_trending":false,"has_trended":false,"trended_number_one":false,"trending_peak_score":null,"trending_peak_rank":null,"started_trending_at":null,"trended_number_one_at":null,"summary_generated":null,"summary_generated_at":null,"summary_model":null,"created_at":"2026-06-29T23:46:59.033383Z","updated_at":"2026-08-21T16:41:57.622664Z"},"effective_severity":"HIGH","badges":[],"impact_analysis":[],"cvss_v3_decoded":{"version":"3.1","metrics":[{"metric":"AV","name":"Attack 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