CVE-2026-13601: Software Security Vulnerability Vulnerability

HIGH
Advisory Identifier: GHSA-f4vh-qr53-q5gv
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CVSS 7.1
CWE-693
Published
Advisory Summary

CVE-2026-13601 is a HIGH (CVSS 7.1) security vulnerability vulnerability (CWE-693: Protection Mechanism Failure) affecting Software libraries in the Maven ecosystem. The weakness occurs when the product does not use or incorrectly uses a protection mechanism that provides sufficient defense against directed attacks against the product.. Remediation is available in the latest vendor maintenance releases.

CVE-2026-13601 at a Glance

CVE Identifier CVE-2026-13601
GHSA Identifier GHSA-f4vh-qr53-q5gv
Severity HIGH
CVSS v3.1 Base Score 7.1
CWE Classification CWE-693: Protection Mechanism Failure
Affected Product Software
Package Ecosystem Maven
Published Date
Last Updated

Security Impact

CVSS: 7.1

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N).

Attack Vector Local (AV:L)
Attack Complexity Low (AC:L)
Privileges Required None (PR:N)
User Interaction None (UI:N)
Scope Changed (S:C)
Confidentiality High (C:H)
Integrity None (I:N)
Availability None (A:N)

How to Fix CVE-2026-13601

To remediate this vulnerability, upgrade all affected Software dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

mvn dependency:tree

How to Check if You Are Affected

To determine whether your Java application is affected by CVE-2026-13601, inspect your build dependencies using the Maven Dependency Plugin:

mvn dependency:tree

Analyze the terminal output to locate any version of Software in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than the patched release), your application is affected.

Note: The mvn dependency:tree command inspects the resolved dependency graph declared in your project's POM files; it does not perform automated security scanning or inspect runtime dynamic classpaths. Always verify runtime container classpaths and shaded JARs.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-693: Protection Mechanism Failure, where the product does not use or incorrectly uses a protection mechanism that provides sufficient defense against directed attacks against the product. In Software, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

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.

References

NVD — CVE-2026-13601 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-13601
access.redhat.com/errata/rhsa-2026:47... WEB
https://access.redhat.com/errata/RHSA-2026:47177
access.redhat.com/errata/rhsa-2026:47... WEB
https://access.redhat.com/errata/RHSA-2026:47178
access.redhat.com/errata/rhsa-2026:54... WEB
https://access.redhat.com/errata/RHSA-2026:54539
access.redhat.com/errata/rhsa-2026:54... WEB
https://access.redhat.com/errata/RHSA-2026:54540
access.redhat.com/errata/rhsa-2026:54... WEB
https://access.redhat.com/errata/RHSA-2026:54605
access.redhat.com/errata/rhsa-2026:54... WEB
https://access.redhat.com/errata/RHSA-2026:54624
access.redhat.com/errata/rhsa-2026:54... WEB
https://access.redhat.com/errata/RHSA-2026:54637
access.redhat.com/errata/rhsa-2026:54... WEB
https://access.redhat.com/errata/RHSA-2026:54666
access.redhat.com/errata/rhsa-2026:57... WEB
https://access.redhat.com/errata/RHSA-2026:57417
Software Security Information SECURITY
https://access.redhat.com/security/cve/CVE-2026-13601
blogs.gnome.org/mcatanzaro/2026/05/... WEB
https://blogs.gnome.org/mcatanzaro/2026/05/11/flatpak-sandbox-escape-via-yelp
bugzilla.redhat.com/show_bug.cgi WEB
https://bugzilla.redhat.com/show_bug.cgi?id=2494110
gitlab.gnome.org/gnome/yelp/-/commit... WEB
https://gitlab.gnome.org/GNOME/yelp/-/commit/c8c8244c8a812860782d635890c9b6c43ecc2639
gitlab.gnome.org/gnome/yelp/-/work_i... WEB
https://gitlab.gnome.org/GNOME/yelp/-/work_items/238
Software Security Information SECURITY
https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-13601.json

Frequently Asked Questions

What is CVE-2026-13601?
CVE-2026-13601 is a security vulnerability in Software classified as a security vulnerability vulnerability under CWE-693: Protection Mechanism Failure.
Which Software versions are affected?
Affected versions include releases prior to current release patches.
What version fixes CVE-2026-13601?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What is the CVSS score of CVE-2026-13601?
CVE-2026-13601 has a CVSS v3.1 base score of 7.1 (HIGH) with vector string CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N.
What CWE is associated with CVE-2026-13601?
CVE-2026-13601 is classified under CWE-693: Protection Mechanism Failure (The product does not use or incorrectly uses a protection mechanism that provides sufficient defense against directed attacks against the product.).
How can I check Maven dependencies for CVE-2026-13601?
Run the dependency tree command: 'mvn dependency:tree'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
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  "id" : "GHSA-f4vh-qr53-q5gv",
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  "published" : "2026-06-29T12:31:44Z",
  "aliases" : [ "CVE-2026-13601" ],
  "details" : "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.",
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  "database_specific" : {
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    "severity" : "HIGH",
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    "github_reviewed_at" : null,
    "nvd_published_at" : "2026-06-29T10:16:30Z"
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}