ALAS2-2026-3337

Amazon Linux 2 Security Advisory: ALAS2-2026-3337
Advisory Released Date: 2026-06-08
Advisory Updated Date: 2026-06-08
Severity: Medium
Issue Overview:

A sandbox escape vulnerability was found in yelp, the GNOME help viewer. Bypassing the fix for CVE-2025-3155, a malicious help document can use a CSS stylesheet embedded in an SVG image to exfiltrate the contents of local files (such as files under /proc) to an external server without requiring JavaScript, evading the Content-Security-Policy protections added by the previous fix.


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 ALAS2-2026-3337 to update your system.

New Packages:
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

Additional References

Release Notes:  Amazon Linux 2 Release Notes

Red Hat: 

Mitre: