VDB
RHSA-2026:54540
RHSA-2026:54540
PUBLISHED
CVSS 7.099999904632568 HIGH
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.
Risk Scores
CVSS 3.1
7.099999904632568
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Red Hat | yelp-2:40.3-2.el9_4.2.s390x as a component of Red Hat Enterprise Linux AppStream E4S (v.9.4) | 40.3-2.el9 |
| Red Hat | yelp-2:40.3-2.el9_4.2.aarch64 as a component of Red Hat Enterprise Linux AppStream E4S (v.9.4) | 40.3-2.el9 |
| Red Hat | yelp-debuginfo-2:40.3-2.el9_4.2.aarch64 as a component of Red Hat Enterprise Linux AppStream E4S (v.9.4) | 40.3-2.el9 |
| Red Hat | yelp-libs-2:40.3-2.el9_4.2.s390x as a component of Red Hat Enterprise Linux AppStream E4S (v.9.4) | 40.3-2.el9 |
| Red Hat | yelp-debugsource-2:40.3-2.el9_4.2.ppc64le as a component of Red Hat Enterprise Linux AppStream E4S (v.9.4) | 40.3-2.el9 |
| Red Hat | yelp-debuginfo-2:40.3-2.el9_4.2.x86_64 as a component of Red Hat Enterprise Linux AppStream E4S (v.9.4) | 40.3-2.el9 |
| Red Hat | yelp-debugsource-2:40.3-2.el9_4.2.s390x as a component of Red Hat Enterprise Linux AppStream E4S (v.9.4) | 40.3-2.el9 |
| Red Hat | yelp-libs-debuginfo-2:40.3-2.el9_4.2.aarch64 as a component of Red Hat Enterprise Linux AppStream E4S (v.9.4) | 40.3-2.el9 |
| Red Hat | yelp-debuginfo-2:40.3-2.el9_4.2.i686 as a component of Red Hat Enterprise Linux AppStream E4S (v.9.4) | 40.3-2.el9 |
| Red Hat | yelp-libs-2:40.3-2.el9_4.2.ppc64le as a component of Red Hat Enterprise Linux AppStream E4S (v.9.4) | 40.3-2.el9 |
| Red Hat | yelp-2:40.3-2.el9_4.2.x86_64 as a component of Red Hat Enterprise Linux AppStream E4S (v.9.4) | 40.3-2.el9 |
| Red Hat | yelp-2:40.3-2.el9_4.2.src as a component of Red Hat Enterprise Linux AppStream E4S (v.9.4) | 40.3-2.el9 |
| Red Hat | yelp-libs-debuginfo-2:40.3-2.el9_4.2.i686 as a component of Red Hat Enterprise Linux AppStream E4S (v.9.4) | 40.3-2.el9 |
| Red Hat | yelp-debuginfo-2:40.3-2.el9_4.2.s390x as a component of Red Hat Enterprise Linux AppStream E4S (v.9.4) | 40.3-2.el9 |
| Red Hat | yelp-libs-debuginfo-2:40.3-2.el9_4.2.s390x as a component of Red Hat Enterprise Linux AppStream E4S (v.9.4) | 40.3-2.el9 |
| Red Hat | yelp-libs-debuginfo-2:40.3-2.el9_4.2.ppc64le as a component of Red Hat Enterprise Linux AppStream E4S (v.9.4) | 40.3-2.el9 |
| Red Hat | yelp-2:40.3-2.el9_4.2.ppc64le as a component of Red Hat Enterprise Linux AppStream E4S (v.9.4) | 40.3-2.el9 |
| Red Hat | yelp-debugsource-2:40.3-2.el9_4.2.x86_64 as a component of Red Hat Enterprise Linux AppStream E4S (v.9.4) | 40.3-2.el9 |
| Red Hat | yelp-libs-debuginfo-2:40.3-2.el9_4.2.x86_64 as a component of Red Hat Enterprise Linux AppStream E4S (v.9.4) | 40.3-2.el9 |
| Red Hat | yelp-debugsource-2:40.3-2.el9_4.2.i686 as a component of Red Hat Enterprise Linux AppStream E4S (v.9.4) | 40.3-2.el9 |
…and 5 more
Timeline
- Aug 13, 2026 CVE Published
- Aug 13, 2026 CVE Updated
- Aug 13, 2026 Distribution Patch
- Aug 13, 2026 Distribution Patch
- Aug 13, 2026 Security Advisory
- Aug 13, 2026 Security Advisory
References
- https://access.redhat.com/errata/RHSA-2026:54540 advisory
- https://access.redhat.com/security/updates/classification/#important advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2494110 issue
- https://security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_54540.json advisory
- https://access.redhat.com/security/cve/CVE-2026-13601 advisory
- https://www.cve.org/CVERecord?id=CVE-2026-13601 advisory
- https://nvd.nist.gov/vuln/detail/CVE-2026-13601 advisory
- https://blogs.gnome.org/mcatanzaro/2026/05/11/flatpak-sandbox-escape-via-yelp/ advisory
- https://gitlab.gnome.org/GNOME/yelp/-/commit/c8c8244c8a812860782d635890c9b6c43ecc2639 advisory
- https://gitlab.gnome.org/GNOME/yelp/-/work_items/238 advisory