CVE-2026-13601
mediumpriority · track · 26EPSS 0.002 · 7 %ileDEEUUSEPSS · scored 2026-10-27
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. This may result in the unauthorized disclosure of sensitive information.
cvss
Technical severity, 0–10. One row per scoring source.
base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 6–7.1
ssvc
A stakeholder decision — act, attend, or track — from exploitation and impact.
weaknesses
The CWE weakness classes this flaw belongs to.
affected products (32)
Products and version ranges known to be affected.
- Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Supportall versionscert_bundDEcpe:/o:redhat:enterprise_linux:8.4_advanced_mission_critical_update_support
- Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-Onall versionscert_bundDEcpe:/o:redhat:enterprise_linux:8.4_extended_update_support_long-life_add-on
- Red Hat Enterprise Linux 8.8 Telecommunications Update Serviceall versionscert_bundDEcpe:/o:redhat:enterprise_linux:8.8_telecommunications_update_service
- Red Hat Enterprise Linux 8.8 Update Services for SAP Solutionsall versionscert_bundDEcpe:/o:redhat:enterprise_linux:8.8_update_services_for_sap_solutions
- Red Hat Enterprise Linux 9.2 Update Services for SAP Solutionsall versionscert_bundDEcpe:/o:redhat:enterprise_linux:9.2_update_services_for_sap_solutions
- Red Hat Enterprise Linux 9.4 Update Services for SAP Solutionsall versionscert_bundDEcpe:/o:redhat:enterprise_linux:9.4_update_services_for_sap_solutions
- Red Hat Enterprise Linux 9.6 Extended Update Supportall versionscert_bundDEcpe:/o:redhat:enterprise_linux:9.6_extended_update_support
- Red Hat OpenShift Container Platformall versionscert_bundDEcpe:/a:redhat:openshift:container_platform
advisories (1)
Vendor and ecosystem advisories describing this.
- WID-SEC-W-2026-2835Red Hat Enterprise Linux (yelp, dracut): Mehrere SchwachstellenDeutsch2026-08-13csaf · cert_bundDE
Ein Angreifer kann mehrere Schwachstellen in Red Hat Enterprise Linux ausnutzen, um Informationen offenzulegen und beliebigen Code mit Root-Rechten auszuführen.
also known as (3)
Other names and identifiers for this entity.
sources
Which sources assert this record, and when.
references (34)
External citations — patches, advisories, analysis.
- https://access.redhat.com/security/cve/CVE-2026-13601cnnvd
- https://blogs.gnome.org/mcatanzaro/2026/05/11/flatpak-sandbox-escape-via-yelp/cnnvd
- https://bugzilla.redhat.com/show_bug.cgi?id=2494110cnnvd
- https://gitlab.gnome.org/GNOME/yelp/-/commit/c8c8244c8a812860782d635890c9b6c43ecc2639cnnvd
- https://gitlab.gnome.org/GNOME/yelp/-/work_items/238cnnvd
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-13601.jsoncnnvd
- https://access.redhat.com/errata/RHSA-2026:47177enisa_euvd
- https://access.redhat.com/errata/RHSA-2026:47178enisa_euvd
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