{"id":"CVE-2026-13601","title":"A flaw was found in Yelp due to an overly permissive Content Security Policy (CSP) implementation provided by yelp-xsl","summary":"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 C…","severity":"high","cvss":7.1,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N","cwe":["CWE-693","CWE-693"],"vendor":"gnome","product":"yelp","affected":["enterprise_linux = 6.0","enterprise_linux = 7.0","enterprise_linux = 8.0","enterprise_linux = 9.0","yelp < 49.1"],"patched":["yelp 49.1"],"published":"2026-06-29","updated":"2026-08-03","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-13601","references":[{"url":"https://access.redhat.com/errata/RHSA-2026:47177","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/security/cve/CVE-2026-13601","label":"secalert@redhat.com"},{"url":"https://blogs.gnome.org/mcatanzaro/2026/05/11/flatpak-sandbox-escape-via-yelp/","label":"secalert@redhat.com"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2494110","label":"secalert@redhat.com"},{"url":"https://gitlab.gnome.org/GNOME/yelp/-/commit/c8c8244c8a812860782d635890c9b6c43ecc2639","label":"secalert@redhat.com"},{"url":"https://gitlab.gnome.org/GNOME/yelp/-/work_items/238","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/security/cve/CVE-2026-13601","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2494110","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-13601.json","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"}],"tags":["nvd"],"epss":0.00179,"epssPercentile":0.06623,"ingestedAt":"2026-08-03T08:24:01.818Z","slug":"CVE-2026-13601","body":"## Overview\n\nA 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. This may result in the unauthorized disclosure of sensitive information.\n\n## Affected\n\n- `enterprise_linux = 6.0`\n- `enterprise_linux = 7.0`\n- `enterprise_linux = 8.0`\n- `enterprise_linux = 9.0`\n- `yelp < 49.1`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `yelp 49.1`","depth":"twilight","depthScore":39,"depthScoreParts":{"impact":39.1,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}