Amazon Linux 2 Security Advisory: ALAS2-2026-3821
Advisory Released Date: 2026-07-20
Advisory Updated Date: 2026-07-20
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. (CVE-2026-13601)
Affected Packages:
yelp
Note:
This advisory is applicable to Amazon Linux 2 (AL2) Core repository. Visit this FAQ section for the difference between AL2 Core and AL2 Extras advisories.
Issue Correction:
Run yum update yelp or yum update --advisory ALAS2-2026-3821 to update your system.
aarch64:
yelp-3.28.1-1.amzn2.0.2.aarch64
yelp-libs-3.28.1-1.amzn2.0.2.aarch64
yelp-devel-3.28.1-1.amzn2.0.2.aarch64
yelp-debuginfo-3.28.1-1.amzn2.0.2.aarch64
i686:
yelp-3.28.1-1.amzn2.0.2.i686
yelp-libs-3.28.1-1.amzn2.0.2.i686
yelp-devel-3.28.1-1.amzn2.0.2.i686
yelp-debuginfo-3.28.1-1.amzn2.0.2.i686
src:
yelp-3.28.1-1.amzn2.0.2.src
x86_64:
yelp-3.28.1-1.amzn2.0.2.x86_64
yelp-libs-3.28.1-1.amzn2.0.2.x86_64
yelp-devel-3.28.1-1.amzn2.0.2.x86_64
yelp-debuginfo-3.28.1-1.amzn2.0.2.x86_64